Recently I gave a presentation at the February meeting of SEMPO Atlanta[link] on Advanced SEO tactics of using Microformats to help with the SEO of your site.
I am posting the presentation here and wanted to add some links to sites and books to help you get up to speed on Microformats.
Microformats basic info:
Microformats and SEO info:
Hope this helps.
Let me know if you have any questions or have any recourses that I might have missed below in the comments.
Thanks for reading!