Geocache bookmarks
I've started collecting some interesting sites on Diigo, which you can see by subscribing to the geocaching tag. BookCrossing looks like an interesting variation on travel bugs. I'm getting an interview with the president of the company.Quotes:
BookCrossing - The World's Biggest Free Book Club - Catch and Release Used Books
Hasn't been updated in two years, but has a pretty good list of groups and other sites
blazerfan's geocaching adventures
TerraCaching - The Quality Geocaching Community
Geocaching With Team Hick@Heart
The Erie Hiker » Kim Schneider: Geocaching Northern Michigan