Note: this post is from 2007, outbound links may be broken.
Statetris – Geography based Tetris
If you like Tetris you should try Statetris.
From the website:
Statetris is an interesting game mixing aspects of the popular game ‘Tetris’ and geography. Instead of positioning the typical Tetris blocks, you position states/countries at their proper location. Fun, challenging and educational!
You can currently choose from the following maps: Africa, Europe, France, Japan, Netherlands, South Carolina, UK and the United States.
Link via Kottke