Anywho, I looked at Jango.com and it.. Well, it doesn't really look good. Pandora just seems to work and flow better (And it doesn't bother me for registration every time I hit the skip button). On top of that, I don't think Jango's system is available on portable platforms; Pandora is already available for mobile phones, so I figure they're more than capable of porting their system to another mobile platform.
As of this time, Pandora has not communicated plans for a PSP version of their service. However, on the "about internet radio" page of PSP's psp website, Sony has announced that they will be releasing a developers package so that pandora and other radio services will be able to stream content on the PSP. There is currently no definitive release date for this package. Keep your fingers crossed that it will be soon!