Seero… geotagged video.
WikiNear, developed with Yahoo’s FireEagle gives you Wiki pages near your current location, via Mashable.
Lightpole via apb, mobile location search app.
British GPS Game via Psfk by Locomatrix.
MakerFair May 3rd, 4th
San Mateo Fairgrounds
WhereCamp 2008 May 17th / 18th
Mountain View CA.
Playing with Cocoa?