I missed this from the Technorati blog
I'm very pleased to announce the technology preview of Technorati microformats search for contacts, events and reviews, and Pingerati, a microformats ping distributor to support and grow the microformats ecosystem.
And from Pingerati
Microformats are tiny bits of markup in web pages that label contacts, events, reviews, addresses, geo-locations, and other commonly published chunks of information. Microformats are often published on blogs and in feeds, but are increasingly published on other types of web pages as well such as event databases, social network profiles, reviews sites, and contact information pages. Traditional ping services only handle blog or feed updates, so we've set up Pingerati to handle microformat updates on any web page.
Interesting! I had no idea there was enough information out there to warrant a search system for it?