I activated the unlimited data plan over 3G with no problem. I was glad to see that it's a flat 29.99, no taxes!
I've only been using it for around three hours and I've already used 115 mb! No way would 250 mb suffice.
I was upset to see that abc does not allow you to stream video over 3G yet. Hopefully that changes soon. YouTube also forces you to view videos at a low quality. However, web pages load up surprisingly fast... Much faster than the iPhone does on 3G.
I have one dead pixel... But other than that I'm very happy.
Oh yeah.. After 3 hours I'm still at 80% battery life. Constant 3G use, video, games, etc.