Geohash Droid is a simple Android Geohashing app. - view in repository
Geohash Droid can auto-detect your graticule, calculate the day's meetup point, and follow you as you travel towards it.
Future features include tracking other people (at mutual discretion), storing a history of meetup points found, and automatically marking pictures taken near the point.
Oh, and achievement support. That's coming soonish.
We currently have no versions of this app available. (Check mode: Market)
The current (recommended) version is 0.7.17 (version code 702).