Nate, I'm still having similar thoughts. But I'm also having trouble imagining what exactly I'd need a MBP for. In my previous jobs it would have been a no-brainer: MBP. But I travel much less now and work in a much less tech-savvy environment, meaning that my working remotely is not necessarily an easy thing (thank god). So I'm left with some challenges to figure out exactly why I would need the horsepower of a MBP. What I do often find myself wanting is something that will turn on in an instant, so I can check my email, the weather, sports scores, and Head-Case. I think that means that the iPad is for me, and I just also want a MBP, but really am not enough of a power user to really need it. I think.
EDIT: Also, I have not yet received the 3G email. That does not make me happy.