I love finding sites and applications that put all of my relevant information in an easy-to-find location.
Essentially, it's a business card on the Web that includes your contact information, social networking presence, and even a limited amount of RSS feeds to your blog posts, Twitter feeds, etc.
If you're feeling especially randy, you can pay for the premium membership, which will allow unlimited RSS feeds, among other features.
I've been using GizaPage to show my social network identity, but I think my Card.ly is more useful for relaying contact infomation.
For the time being, I think I'm going to use both.