The International Red Cross website has compiled a directory of names of people who their relatives are seeking information on. At this point, I’m not sure if it will provide direct information, but the Red Cross may provide information to the contacts posted on the website if they encounter the individuals described. In other words, it may be possible to post the personal information (name + address) for those we are worried about, and then hopefully any news will be routed to the person who posted the request for information. The list is intended primarily for immediate relatives, though it is also for close friends. Find this list at http://www.familylinks.icrc.org/haiti/people. Apparently a pair of haitians have also set up a similar list here.