Update(Sept 21, 2011): The Viewpad7 ROCKS! I just got back last week from Mexico and used my Vpad7 as both a Phone and Internet Device. Picked up a TelCel SIM Card and it was up and running. Traveled from Merida down to Cuidad del Carmen and had 3G signal most of the way. Mostly did texting in Mexico and back to the USA without any problems. Checked my Yahoo Email Account without issues. Reserved a hotel room in Campeche using KAYAK.com without issues. Updated FB with pictures and comments on the fly. I use it at home reqularly on the Home WiFi and where Free WiFi is available.
There were a couple of issues with Android trying to type and it would start adding characters on it's own so some texting got to be annoying. I haven't been able to link up with my T-Mobile Blackberry via BT using PDAnet and I've only got PDAnet working via BT when I had a Moto Cliq one time. I've been hit and miss on some Movies I've setup using FabDVD where some run and others don't. I think it's FabDVD cuz I tested the same files on an Acer A500 with Honeycomb and had some issues there as well.
Overall, still glad I made the purchase even with the annoyances. Currently watching for the US release of Acer A101 which is another 7-inch Tablet with 3G but has Honeycomb. I'll still keep and use Vpad7, especially since I want to test its Wi-Fi Sharing abilities the next time I'm out of the US. If you want a 7-inch Tablet with lots of Marketplace Apps then get this tablet...I checked out the Acer A500 and there are very few Apps available for Honeycomb right now.
Overview: I place the Viewpad7 above the iPad for the simple reason that it has these features...is more portable, has dual cameras, has MicroSDHC port and a SIM Port. The Samsung Tab shows up on paper with a higher resolution, but I would have expected the Tab to have an AMOLED screen for that price. The 1GHz processor on the Tab is definitely nice, but not a deal-breaker. I do have a problem with Samsung hobbling it's phone features for the premium price, even if it is subsidized by the Carrier. Samsung Tab, Viewpad7 and iPad are the only real choices if you want more features than an eBook Reader can provide.
External: I definitely like the portability of the Viewpad7 which fits in your jeans back pocket even if in the Leatherette Case. The Case could use an SD Card, Credit Card and SIM Card pocket...but that's a personal preference. The fit and finish are clean but they should have placed the Mini-USB/Charge Port and Headset Port on the side so that you could connect to them even when the unit is sitting on the Case in Easel Mode. The speakers are pretty loud and you'll get people looking your way if you're playing 'Video Poker - Jacks or Better'. Easy access at the top of the unit to the MicroSDHC and SIM ports are a real plus. Sure would be nice if this thing had an additional full-size/full-service USB2.0 port given the thickness.
Wireless Functionality: Popped in a T-Mobile SIM with 3G Internet and was able to make calls with no problems. You can use it as a Hub for making Conference Calls and a BT Headset works well. I was only able to get EDGE Internet, which was extremely slow. I could load up the WSJ website to read articles, but anything that used even a mildly graphics laden website just wasn't going to happen. A little research and I found that T-Mobile uses UMTS1700(upload) and UMTS2100(download) for 3G and this unit only has UMTS850/1900/2100. 90% of the world runs 3G Internet on UMTS2100 where it's available. The phone is World GSM ready with 850/900/1800/1900, but I won't get to test this out until mid-year from Mexico and hopefully Thailand after that. As far as 3G, it should work in Mexico with TelCel as long as they aren't using the mini-SIM. If you have a reliable Wi-Fi signal, the internet pops along pretty well. I was able to run YouTube clips with no issues. Flash 10.1 isn't available yet, but I hear it is in the works. I tried hooking up a Palm Folding Keyboard and Interlink Mouse via Blue-tooth with no success...it doesn't play well with Pairing Codes that aren't fixed.
Android OS 2.2 - This is where I think the unit needs more work. Programs like Picture Gallery would 'Hang-Up' once in awhile and I'd have to hit the 'Return' to take a step back to get it going again. Transferring pictures from my PC was kind of hit and miss with some having to be reloaded in order to be viewable. The Gallery was nice when it worked properly, adjusting resolution of pictures automatically and allowing you to re-orient. 'Video Poker' would lock-up and I'd have to exit and restart. I'm still trying to figure out how to get imported music and video to work. The User Guide, which doesn't ship with the unit and is available from the Viewsonic Website, is pretty useless at best. Transfers don't work as simple as 'drag-n-drop' like on my Android 2.2 phone. This unit can be set up as a Wireless Hotspot, but since I haven't gotten to use 3G Internet it hasn't been tested real-time yet.
Hardware - The Cameras are nice, but nothing to brag about. A flash would have been nice and higher resolution always a plus. They work. The Internal 512MB is ROM, which means you'll have to add memory through the MicroSDHC port. I wish it had at least 512MB Internal RAM so I could keep an on-board secure file for passwords and other sensitive info. I haven't had the chance to run the battery down, but I've gotten 3hrs+ continuous use with some juice still showing on the Battery Indicator. The Google Maps feature with GPS-Sats used as a navigator works well. This should work fine with AT&T 3G Internet and allow me to order pizza on the run and then navigate to pick it up.
Docs-To-Go - Having this built in is very nice. Word and .pdf Documents seem to work best. I haven't been able to get a PowerPoint file to work yet and Excel works in basic mode, but still haven't been able to get it to function on a Workbook between sheets.
Future - Still have to get imported vids and music to work. Testing out on AT&T 3G Internet and Wi-Fi Hotspot feature. Root MagicJack so I can make International Calls back to the US. I want to print wirelessly and it should be able to hook up to a Projector using a USB Printer Cable available on eBay and Amazon.
Overall - This Tablet definitely has some issues still to be resolved and isn't as reliable as many Android Phones out there. But it seems to be the best of what's available. I'd still pick this over the Samsung Tab and if I had to go with the Tab I'd pick the AT&T version so it would function Internationally. I can see using this while waiting at the airport to board, or at the hotel to download my Electronic Boarding Pass before I leave. I should be able to hook up my laptop via the Hotspot feature in a pinch. Fiddling is the only way to learn this Tablet since the User Guide is very limited. The 7-inch format is definitely the way to go with lots of patience required. Ordering via Amazon with Free Shipping is awesome!