Playstation Vita Update 1.80 Is Now Up! Play PSONE Games!
So far sony is only mentioning 9 games available today, with more made weekly. Unfortunatly my Vita needs a charge and the charger is 64 miles away!
UPDATE: Besides the pathetic 9 games SCEA will allow you to download, if you have a PS3 you have access to WAY more. Just download the game on your PS3 and DO NOT INSTALL IT. Plug in your Vita, go through content management and viola! Not all games will work, but a lot do.
Also, I noticed "Playstation Mobile" in the content manager....hmmmm
Source: Playstation Blog