If you’re interested in Microformats, do yourself a favor and head over to my friend Emily Lewis’ site A Blog Not Limited. I’ve been played with Microformats for a while, but these informative articles pushed me over the edge:

Getting Semantic With Microformats, Part 1: rel-based
Getting Semantic With Microformats, Part 2: XFN
Getting Semantic With Microformats, Part [...]