Just stumbled across this. You can join technorati for free, then "claim" your blog's spot in their directory. If they approve your blog, it get listed in their index, and on their category page. The category pages are PR5 and Technorati itself is 7 and has great authority. I have to think this drives traffic too. Anyway, didn't know about this, thought I would share it. <edit> Should have said backlink (not plural) in the title, my bad.