One year ago it was the reddit-xkcd fundraiser for the EFF (as chosen by the greater reddit community). This year, it's Feed A Need.
The economy sucks and we know that. More to the point, Erik realized that, so when he joined reddit, he came armed with a radical new idea for this year's fundraiser.
It wouldn't even be a fundraiser. It would be a skill-raiser.
To quote blog.reddit:
This holiday season, reddit.com is launching its first Feed A Need project. Instead of asking for monetary donations, we're asking people to donate a few hours of their skills & energy. So if you are a programmer, designer, artist, lawyer, geology professor, bacon cooker, or anyone else with a few hours to spend for a good cause please consider participating in this year's Feed a Need charity drive.And from these volunteers, a chunk will be randomly selected to win a range of prizes - including an XBOX 360 (with games) from Destructoid and autographed XKCD goodies. Of course, none of these great prizes will compare to that feeling you get from volunteering some of your time and skills. But they are nice.