Post your resolution that you are playing at. I'll make a total count and keep it at the top of the post once we get a few people listed.
Once I am home, I'll be running it at 1680x1050.
Results so far:
2560x1600 - 1 people
1920x1200 - 1 people
1680x1050 - 6 people
1600x1200 - 1 people
1280x1024 - 2 people
1280x720 - 1 people
1024x768 - 1 people