It will be my couch web surfer. I can get myself away from the computer to surf instead of on my Pre- which is so slow on so many sites. And it's too small to do a lot of reading.
Kindle App - I'll try this out. Maybe it'll help me get back in to reading. But they say using electronics before sleeping is a bad idea, so it may deter me. Plus I don't know how it would be outside, seems like it'd be crappy.
XBMC Remote! One of the things I'm really excited for, especially after seeing some of the iPad apps people have developed. As much as I like the $50 Lenovo keyboard/mouse I bought, a remote app would be really, really cool.
The usual travel stuff. It'll be awesome for flights and nights at the hotels.
I've never really had an interest in owning a laptop, so a tablet is the perfect solution for me. It's so easily portable.
I think a lot of these type of 'what do you plan to use it for' questions also hinges on what the TouchPad will be able to do, and what kind of apps will come to it. For the moment, from what we know, it may not be able to do a whole lot. In time, that will change.