Is anyone else Tumblr-ing?

I discovered this new service today called Tumblr. It's kind of a hybrid between Twitter and blogging. I found it through another blog, and thought it would be handy to use it like she does, as a place to post things you found on the 'net, stuff that's not worth a whole blog post. I don't know how long I'll stick with it, as I could probably do something on Blogger that's similar. lookieloo.tumblr.com

Has anyone else tried this service? So far, I'm not totally digging the interface.