My Ipad is sitting at Fed Ex-I missed them delivering it today-so I'll go get it this evening. Anyway-I plan to pay for the 3G service. At first I thought I'd pay the $30 a month for unlimited-but now I'm wondering, if I'm in a wifi hotspot, does it use the wifi?? Or will it use the 3G network? KWIM? I know I will OFTEN be in a wifi hotspot (HOME!)....but if it just automatically goes to the 3G network, I should probably just pay for the unlimited. What are YOU doing?