Yeah, I'm waiting. So far, there is nothing out there that is interesting enough for me to take that plunge yet. Maybe when there are some apps that will take advantage of the USB port on the camera kit and you can use it for something besides a keyboard or headset. Heck, right now there aren't even that many interesting apps in the App Store on iTunes yet!
There are a couple of "multi-tasking" apps available now, but all they really are is a way to have 2 browser windows open on the same screen. It's a nice concept, and useful in it's place, but somewhat misleading in the names.
I doubt anyone will put too much time into making something that will be obsolete in a couple of months - I suspect they will wait to see what really functions on 4.0 and work to enhance that instead.