Well, it's that time of year again (spring), which means it's time for Lanageddon!
http://www.lanageddon.com
The only confirmed tournament this year is CS:Source, but assume that confirmations will be made soon on the UT2K4 or UTIII, TF2, DOTA, and L4D tourneys, or at least mini-round robins.
So...who's going? I need another couple for my TF2 and L4D teams.