Hi, SO many homeowners are in this position due to market conditions, not irresponsibility. First, if you can afford to wait the market out and eat the 100-150 a month differential. DO THAT.
If the negetive cash flow each month is killing you and you want to refinance, you should know that a fee appraisel is not the same as a purchase appraisel. The banks are even much more conservative on a fee appraisel (refi) TRUE. ....
I would not even consider trying refinancing. As I understand your posting, you do not live in the home now, so for purposes of refi it is considered an investment, and the rate/ratios/qualifications will be much different. . The declining market in your neighborhood will greatly influence the appraisel and from what you posted it sounds like the declining prices are influenced by shortsales and REO properties. This is very common for 0 down FHA buyers in neighborhoods built (2000) forward. (at least where I live)
From a basic real estate standpoint, you are in a short sale position right now.