For instance, Flickr + Google Maps, Upcoming.org + Google Calendar,Yahoo! Local + your address book, and many more possibilities and permutations.
All of these scenarios are possible due to Microformats, an emerging standard for injecting semantics into HTML.
You can get more information about Microformats at http://microformats.org or by clicking on “homepage” at the bottom of this page. Kaply Operator Download