Help Haiti with Halo
Murder your friends over XBox Live in a game of Halo on Wednesday and Thursday and Bungie will donate $100 for every 1000 gamers online who use the new Heart emblem in the game.
According to the Bungie Blog, the company have set a cap at $77,000 for donating to the cause. Yes, it is a bit cheeky to set a cap and try and garnish some free publicity, but at least the end game is positive.
Interestingly, you can donate in other ways as Irish twitter users rally the troops to raise money for the cause too. Not as much as $77,000, but the Irish twitter community didn’t make millions in revenue last year.

very nice gesture
Never played Halo in my life…. Does that mean Im a bad guy?
It probably means you're more educated then most of us. Halo is a terrible experience (takes too long to join games, which are usually either very short or badly balanced) but it's so terrible that it becomes fun.
Though it's not an experience you'd recommend to anyone with a nervous disposition to racist/sexist comments from 13 year olds