I have been drooling over pinterest since I first saw it on Tara Whitney's blog. It's a great way to organize things that you see online into different bulletin "boards", by category. I haven't done much yet with my account, but I plan to soon. I really like the ability to see thumbnail views of webistes that have caught my attention.
If you are interested in creating an account, enter a comment and I'll "invite" you. For some reason you can't just create an account without an invitation from pinterest directly or via a friend.