Bitcoin Arcade is a new bitcoin website under development dedicated to Bitcoin-related games. It will serve as a place to promote Bitcoin through gaming, promote games that incorporate Bitcoin, and develop new games centered on Bitcoin.
http://BitcoinArcade.com
We're currently working on a few browser based games, including a bitcoin block breaker game, a mining game, as well as a few simple games like pong. We're also working on a system for people to submit games, but until that's done you can simply email: bitcoinarcade@gmail.com.
This is a fairly big project, currently being worked on by a single programmer. If you would like to help us out, please donate to 1A9eSnTGz3MjF5eLMPY6yt9pJECsCxiZAU. Thank you!
Update: December 2012 Update!
In the last few months of downtime (took the site down for a complete redo) the site has been completely redesigned and we're taking the project a lot more seriously now. Two new bitcoin games as well - 51% Attack and Bitcoin Juggler - feel free to check them out on the site. Would really like to get some externally made games hosted on the site, so we can promote them as well. There's a form on the site to submit games to be put up, along with a link back to their website and their bitcoin address.
Check out http://BitcoinArcade.com and follow @BitcoinArcade on Twitter for updates. Hoping to develop a few more site features and a lot more games in the coming months!