Yip - Gravity Rush is getting a full retail copy and PSN release in june for EU (SA)

very ecxcited
As for selling your PSP - thats why Im saying if you have a PSP now that you can still play games on, keep it. selling the psp and getting a PSvita - Especially if you dont really have any PSV games you want to play on right now might be a bad idea.
Rather play your PSP until the PSV games you want are actually out. you May end up with a beatiful PSV now with no games to play

so you might as well get it after the price drop
But for me, I thought the PSV was worth buying for Uncharted GA and Wipeout alone, so thats why I bought it
BTW - not sure if you played God's eater on PSP yet - that was also really cool and will help kill the time till the PSV games you are looking forward to are out! !bm