The Electronics Software Ratings Board has listed a bunch of PSP games for PlayStation Certified Devices, which would include Sony tablets and the Xperia line of phones. PlayStation LifeStyle says that Syphon Filter: Dark Mirror, Daxter and fl0w have been rated by the ESRB so far. I'd bet more are coming down the line.
It's a start, but a really slow start for for the certified devices program, which I bet is going to have a really hard time getting off the ground. A handful of PSP games probably isn't going to cut it. Now, launching a larger library with full Android compatibility would be huge.