I am still thinking about how to use RDFa and microformats ... even while I am here in Orlando at BarCamp...

I see there are Structured Blogging plugins for Movable Type and WordPress that in Drupal terms are new content types that allow you to create things like contacts, events, reviews using Microformats including:

hCard
hCalendar
hReview
relLicense
relTag
XFN
XOXO

Good Idea make it easy for the end user to do this stuff ... please!