That's what I was wondering. I've got my iPhone 4 and would just use it to tether the iPad.
You can't tether it to the iPhone. It's BS, but you have to do some jailbreaking to make that happen. Not cool, but that is way it is.
If you were lucky enough to get PDAnet before it was pulled from the App Store a long time ago. Or pay the $20/month from ATT....
That was out, what all of 2 hours?
No Flash support is really pushing me to pick up a notebook, but PDF's work just fine.