I ordered the 3G and it came in two days ago. I bought my family the WiFi model the day it came out so I could play on one while I waited on mine, plus they'd have one to play on without wanting to play with mine
I plan on using mine to when I travel. I don't see it being a replacement for my MacBook Pro, instead just a fun thing to play on when I don't need the muscle.
See ya 'round