Geotagging is now the “in” thing to do.
After a year or so of nagging and Greasemonkey hacking, Flickr finally incorporated geotagging into its photo service.
What I’m seeing next for Geotagging:
Digg (newsstory geotagging)
Del.icio.us (bookmark geotagging)
Last.fm (music geotagging)
Wikipedia (article geotagging)
Upcoming.org (event geotagging)
Youtube (video geotagging)
Of course, you could find geotag userscripts at http://userscripts.org but it would help matters if they’re to integrate the capability into their services.