If your credit has been hosed and you can rent for a lot less than your mortage+taxes+insurance+maitenance, etc
Then you may try not paying and see how long it takes for them to boot you out. Or get in touch with the walkaway guys on the Internet.
Ask yourself how long it may take to get back to the price you paid for it? Could that money be put to work in another house/investment that would appreciate a lot more in that same time period? Or at least get you a lot more for you money?