http://addictinggames.com/50states.html I don't know if it has been posted here or not already, but I enjoy playing it. My best so far is 4 miles error. A lot depends on the luck of the draw as to the order the states are presented. If you get some of the rectangle states or the Midwest first it's easy to miss by a bit. There is also a state capital game on the same sight where you try to place the state capitals on a map.
Damn, I didn't know I was being timed! I wouldn't be staring at the Rolex race and I could have been quicker. You're right, if you get a square state with no identifiable coastline to help you line it up, you're screwed. Also, it depends on where you grab the state to see where you're lining it up (or risk covering up the reference marks with the mouse). Oh, on the first try I got a 94.11 - 6 miles error - 498 seconds.
Thanks that game is really going to come in handy teaching my daugher the states. I bet the capitol game is going to be a big help too.
Just in case you wanted more: Europe: http://www.addictinggames.com/europemap.html I just opened up the Europe game and got Luxembourg as the first county. Africa: http://www.addictinggames.com/africamap.html Middle East & SE Asia: http://www.addictinggames.com/MESAmap.html