I have just finished participating in a tournament for this game called Alliance of Valiant Arms. The game is a modern warfare FPS that is strictly multiplayer only. It has a HUGE Korean community and is just starting to branch out to the United States. Here is the Korean site http://ch.gomtv.com/421/25443 also www.pmang.com (Its all in Korean, but I was able to translate the page).
The US site http://ava.ijji.com has basically just started, and has a pretty big following in terms of the public community, but it still needs some good competitive gamers for more top teams:] ATM, my team(Team Zephyr) is getting sent to Korea in December(14 days), and it was for winning that tournament. The world finals are being held in South Korea for a 10k first prize. After looking around the Korean site, I realized that these events are quite common(2-3 a year on the US side and a bunch on the Korean side). If you guys wanted to give the game a try, maybe a reunification of FPS gamers to a solid game could help PC FPS as a whole:]

http://ava.ijji.com