This is a common concern right now...there is an epidemic of property loss due to defaults.
Right now, the lenders have reverted back to the

ld days" of lending with regard to their standards....good credit (700 FICO+) and a traditional down payment (10%-20%). Investors are no longer backing sub-prime mortgages therefore the offerings are non-existent for blemished credit.
Hang in there...there isnt a time frame that I can see where sub-prime will be back in the picture, but if I had to guess, I would say 5-6 years depending on how long this default wave rolls on.
Work on getting your credit up and running and keep it clean.
Also, you were advised on the possible tax implcations for the short sale right?