Many people have been how they can help in Haiti. Haiti will need a lot of help in the rebuilding process, and there are many organizations looking for skilled people to lend their expertise. Thanks to SEI for providing this list:
Natural Building Network is helping to coordinate skilled natural builders with relief organizations. NBN does not directly manage such efforts, but help coordinate skilled people with relief organizations such as Builders Without Borders, Engineers Without Borders , Groundswell International, Permaculture Haiti and the Permaculture Relief Corps. Interested in getting involved? Email NBN director of events Max V. Jensen at email@example.com. If you have natural building or permaculture expertise and would like to donate phone or email consultation time to organizations supporting rebuilding efforts in Haiti and elsewhere please click here. If you have a high need project that could use this list please contact us at firstname.lastname@example.org.
Colorado Haiti Project is looking for structural engineers.
There is also a one-day workshop on Rebuilding Sustainable Communities in Haiti after the January 12 Earthquake being held on April 9, 2010 in Boston. Contact The Center for Rebuilding Sustainable Communities after Disasters (CRSCAD.