Jean isn't the only former Fugee trying to help. Former band mate Pras Michel was also talking to fans and appearing on TV to raise awareness about the crisis. An MTV article mentions the possibility of a Fugee benefit concert.
Slash Tweeted that he wanted to organize a benefit concert for the victims. Coldplay's Chris Martin got in on the act, too, urging fans to donate. I'm pretty sure all this means we can expect to see a massive "Aid for Africa" type sort of project, and I think that's great. If there was some sort of big fund raising concert, I'd be happy to help. I don't know how to do much, but an extra pair of hands always helps.
If you'd like to help the people of Haiti, just about every charitable organization in the world is taking donations. Here's a good list of charities that won't rip you off.