According to this poll, 16% of iPhone users will buy an iPad. What I think will be an even bigger percentage is those iPhone users who will buy a second generation iPad. That's what I might do.
A couple days ago I entered a contest to win an iPad. If I win, I'd say there's a 60% chance that I will just sell it for a little under the original price, pocket the money, and the use that money to buy a much improved iPad in another year or so.
So, what will you do? See my poll to the right.