Some of you may remember my post earlier this year about getting a tablet to evaluate how usefull they would be for developers. Well, as far as I'm concerned the verdict is in: They freakin rock!
Now, this isn't me as a developer talking, but me as regular laptop user that attends to many meetings (and may possibly be the most unorganized person on the planet). From a strict developer stance, tablets don't seem to bring a lot to the table. They're basically laptops, only they aren't as powerful. So if you never leave your cube, and you only need a laptop for development purposes, then a tablet will be lost on you!
But, if like me you find you're self attending more and more (and more and more) meetings on a regular basis then think about buying a tablet next time you're in the market for a laptop. Even if you have to develop on it also, some of the new tablets have enough steam to power VS.NET/SQL Server/JBuilder/IIS/WebLogic/insert memory hogging dev tool here.
I'm currently using a Acer TravelMate C300. I love it. It's a bit heavy (right Rajin), but it's better than having to carry around a laptop and a tablet (which I was doing for a while).
BTW, don't even think of trying to use a tablet without OneNote. OneNote is the killer app for tablets!