Just being underwater does not mean the world is coming to an end. Are you making the payments? Are you falling into debt or just upset because the house is not worth as much? I had a house in 1992 that was worth less that I paid for it but I kept it and in 2006 it was worth 3 times what I paid and today it is about 2 times what I paid so things work out in time. If you can hang in, then do so.