Townhomes are the toughest to resell right now because there is lots of competition from the builders still, and they are going to be there for a while. There are 51 listed on the market in La Villita right now ranging from 1600SF to 2500SF. The DOM would be very difficult to figure out because builders have these put in the MLS before they are built and even if they have a contract on them, they don't change the status until it sells...
However the resale ones, there has only been one in the entire 2007 year and it was on the market for 245 days.
On the single family homes, there are right now 9 homes in the MLS...ranging from 1600-3900SF. Of those 9, 5 are resale. They have been on the market for 25, 135, 59, 97 and 18 days and counting.
There has been also 9 resale homes in 2007 with the following DOM 82, 15, 29, 243, 617, 191, 16 and 7.
All these homes ranged from 2700 to 3800SF.
I hope this helps. Let me know if you want a more detailed market analysis for your house.