FireEagle is a new Yahoo service. (In beta, of course.) It’s a user-geolocation service with privacy controls that can tie into other applications; think of it as a Twitter for geographic coordinates. It’s one of those things, like RSS, whose real usefulness becomes apparent only when other things are built on top of it. Andrew Turner has a post about it; see also O’Reilly Radar. Invitation-only so far, so I haven’t played with it yet; Richard has a screenshot.

See also WebWare, ReadWriteWeb and TechCrunch.