Ethan Zuckerman has a post on World Changing about how best to keep up with the aftermath of the earthquake in Haiti. Among the correspondents, Georgia Popplewell of Global Voices has set up a live-from Haiti-Twitter site. Chris Sacca posts "Six ways you can help in Haiti" which includes a link to Wycleff Jean’s site, Yele Haiti.
This will get you started. By all means, keep us posted on any interesting developments.