Has anybody tried the Panasonic N5HBZ0000055 Wireless LAN Adapter with this TV? There are websites that say it's compatible with the Panasonic TY-WL20U (the one Panasonic says you need for this TV), and they're running about $20 bucks.
I received the N5HBZ0000055 and just set it up. The TC-L42E50 recognized it immediately. All I had to do was input my router's security key and everything worked. So far I have streamed some Pandora and played some mp4 files over my network. I don't have Hulu+ or Netflix but I might do a trial to see if they work.
I really think these are identical to the TY-WL20U. The part number on that one is N5HBZ0000056--if you google that, you'll come up with a technical listing that shows it is an alternate listing for the *55.
I bought mine from DinoDirect who said the N5HBZ0000055 is identical to TY-WL20U, but it won't work on my Panasonic TH-L42D25A. The TV works OK when I connect it via LAN cable, so be very very careful!