I don't own one, but I've extensively researched it online and "played" with it at BestBuy.
If you need a compact, advanced, wireless laptop then I don't see how you could go wrong here. With VMFusion or Paralells, you can even run Windoze on it without rebooting. This is a sweet piece of technology.
FYI - I preordered mine from Apple in the middle of Jan and just received it this week (2/25). So it isn't just Amazon - I have read posts that say some Apple stores have them - but I think that might be false.
I'm assuming you're thinking of air travel, "twiddle your thumbs and look out the window"... The solution of course is to use the Magsafe airplane adaptor. Most airlines have empower or regular cigarette style power ports already and some are adding standard AC outlets to their seats.
You can look it up at http://www.seatguru.com
Most business travelers have probably already figured this out though and will select seats with a powerport.