Today I bought Super Stardust HD from the PSN for $9.99. I haven't played much of it yet, but it's lots of fun. Plus, trophies... =P

I also played some of The Lord of the Rings: The Return of the King. This game is a classic. It is one of my favorite games from PS2. Usually games based on movies suck, but not so with this adaptation. I recommend this to anybody who owns a PS2 or backwards compatible capable PS3. You should be able to find it used on the cheap.

I'm still up in the air about getting stardust. not to sure if trophies will be as accepted as the 360's AP.

I remember playing return of the king, awesome fun, by memory the two towers game was very good too.

Two Towers was very good as well and the Return of the King improved on what Two Towers did.