Chunky/others,
Have you guys looked into tethering at all? I have a Blackberry Curve 8900 and would LOVE it if I could figure out a way to tether the iPad through this to get internet. It's not 3G, but it would just be for some limited use while on the move. I did some web research this morning and from what I saw it looks like it may not even be possible.
I had tethered my Macbook through my old blackberry a few years ago and it worked well. I'm just guessing the iPad won't have all the drivers/communications stuff needed to set up the connection. I didn't see any apps available for this either. I'm assuming AT&T/Apple are tightly controlling the ability to do stuff like this.
The only other option I read about is somehow setting up my Blackberry to act as a wifi hotspot. Again, though, I didn't see any Blackberry apps that let me do this.
If I could get free internet through a tether this would be so