Haiti Children is a legitimate organization. You can see the founder (a former Playboy Playmate...) interviewed here by Diane Sawyer: http://www.youtube.com/watch?v=9dCfKxPOjKE

However, before you donate, you might consider a larger and potentially more efficient organization like http://www.care.org/ or http://www.redcross.org/

I thought it was good, just want confirmation that it's a legitimate site!