It’s quite a useful extension on pages with loads of info on. Plus having open standards for this sort of information is a useful thing anyway.
Get an hCard here.
Too bad you can’t get the extension on the Flock site yet. They do have a good selection of extensions though if you havn’t looked yet. Or havn’t even downloaded Flock yet.
Rating: 7/10 – It’s not too useful on pages with only one hCard on, except for novelty purposes.