So i bought a PSN card today and need some good recommendations. Unfortunately all the stuff I want (Bastion, extremely twisted shadow planet) is on XBLA. But I know there's good stuff there. I'd really prefer a paltformer but anything good will do. For the record I already have Outland, the spyro games, Scott Pilgrim, and some others.

Flower, flOw, MVC2, Fat Princess, echronome.

Joe Danger is a damn good time. 

^ The above ^
 
and Stacking...

Limbo is on there now isn't it? You should play that

Outland

Crescent Pale Mist. 
 
Seriously, pretty much no one knows about that game, but its awesome. Oh, and its $6

abe's oddysey. it's a ps1 game.  it's a great platformer if you can deal with the 1970 graphics.