I love http://www.shelfari.com

It's a website where you can keep track of the books you've read, plan to read, and discuss them.  So, instead of re-typing my favorite authors and books, you can check out my profile there instead.

http://www.spicymagnolia.com

my friend's blog

I'm still figuring this out, but I'm going to see if this is a category I can add more to.