The Jet Set Radio will be releasing first for PlayStation Plus members on September 11 and September 18 for anyone on PS3 for $9.99.
Both XBLA and Steam will release on September 19 for also $9.99. Sadly Vita users will have to wait until October 16 to get their hands on. Jet set Radio Was supposed to release on Summer and Sega is really cutting it close with the Console Versions but its way off on the Vita.
Anyways the wait is almost over.