It's in my profile for a while, but forgot to mention it here.
It's a belgian site where people from belgium can gather nice locations from our country, along with a picture.
To do that, one must register. You can then add locations and pictures, view member-profiles and comment on every location.
It uses the Gmap-module to add locations on a map.
I've used Microformats everywhere, most of all hcard, hreview and geo.
It's a bit slow in my opinion, maybe that Dreamhost, or the fact that I'm in Belgium and the server in Los Angeles.
It should be completely valid xhtml strict, but to be sure I've changed the doctype to transitional.
It's in dutch right now, maybe one day I'll internationalize it. :-)