You can win a pair of 8800GS SLi cards over at Motherboards.org just for filling out their contest form. Two XFX GeForce 8800 GS 384MB DDR3 XXX cards, to be precise.

Or, if you're more in the market for a shiny new case, you could win an NZXT Tempest over at OCIA. This is the case that really resembles Antec's 900 - plenty of blue fans and airflow. This contest is forums-based; you need to be a member, & post a pic of your case or work area, and the crappiest submission wins. Hah.

First we've got the ThinkComputers guys, who are giving away a trio of prizes from CoolerMaster. It's a forums-based contest with a 35-post minimum. Posting in the contest thread gets you one entry, while if you follow along with the CoolerMaster trivia throughout the contest, each correct answer will get you additional entries.

The Shrimpies have been appointed the task to send one Belgian overclocker (or team of two) to Amsterdam, Netherlands for the European MSI overclocking finals in August. Post your o/c'ing results in their forums in order to get into the pre-qualification round. The top three will get prizes, and the winner will get to represent at the finals.