No, the PSP doesn't have a touch screen. I agree the new smartphones are great canadites and more of them to need to get supported. I just replaced my Treo 700p, which was completely unsupported, with the new HTC Mogul, a WM6 device (ick, I know). Anyhow, those devices are sort of, kind of, supported. I did manage to get it running... but it had some issues. I was going to track those issues down and perhaps build a proper WM6 orbiter, but then my Core MB died... again... I still haven't got to replacing it yet (long and complicated story).
But, I still think it would be cool to use the PSP as an orbiter.