This site lists some items that you can get for Home:
http://boardsus.playstation.com/playstation/board/message?board.id=ps3home&thread.id=626754

I also got 2 shirts so far from playing Street Fighter 4:
-Dan Shirt
-Shadaloo Shirt

I also got 2 free shirts from the Home Mall:
-Ghostbuster shirt
-Namco Helmet
(not sure what the other shirt I got free was from)

THe link also mentions items from the various special areas
ex. EA area, Killzone area etc.

Also items from playing the Namco Museum demo.