Pay down on second mortage when underwater?
There are programs out there which will let you refinance even when underwater, under the Government's HARP program. You are overpaying by nearly $7,000 per year compared to a refinance to 4.5%. A classic example of how the bubble hurt people who overextended themselves a bit as housing shot up.  The bank risks a $50K loss if you default or short sell this property. I'd go in and sit down with a branch manager and ask what they can do to recast the loan to a lower rate as you are ready, wiling and able to keep the house and make your payments. Good luck.