DreamHack Winter 09
DreamHack 2009 in Sweden starts in just a few day! I'm expecting a huge BYOC area because of previous events, and tournaments that are just for BYOC this year. In general DreamHack will have tournaments in Counter-Strike 1.6, Quake Live, Counter-Strike Source, Trackmania, World of Warcraft and even a few console 1v1's like Tekken 6 and Street Fighter IV.
Notable others: Starcraft, Quake World, Modern Warfare 2, and Left 4 Dead amongst others. You can find the full list here: http://esport.dreamhack.se/tournaments
There are some huge prizes up for grabs, like a prize purse of 200,000 SEK ($29,000 USD) for CS 1.6. The prizes for all the tournaments total over 600,000 SEK ($100,000 USD), I would expect a little more normally, but this event is relatively new and I see a lot of potential in it. For more details on the prizes visit: http://esport.dreamhack.se/news/view/58