We Now Support Microformats, screams the Yahoo blog. What? You dont know "microformats"? Tjeeeah, in that case more information can be found on microformats.org. "Designed for humans first and machines second, microformats are a set of simple, open data formats built upon existing and widely adopted standards. Instead of throwing away what works today, microformats intend to solve simpler problems first by adapting to current behaviors and usage patterns (e.g. XHTML, blogging).". And checkout wikipedia as well.
Well, back to Yahoo:
Starting today, we’re happy to announce Yahoo! Local fully supports the hCalendar, hCard, and hReview microformats on almost all business listings, searn=right valign=topch results, events, and reviews. There are a few reasons behind this change, which for now, will be transparent to almost everyone.
In less-techy terms, “microformats” are an open standard for structuring web page content in a meaningful and reusable way. At Yahoo, we’ve been big microformat fans — Yahoo! Tech uses the hReview microformat for all product reviews, Flickr supports XFN and hCard on all profile pages, and our own Upcoming.org was the first big hCalendar supporter.