If you want to experience all of Tales of Graces grab your DS. Namco Bandai added a downloadable dungeon crawler called Kamenin Merchant.
A scan from V-Jump explain the mini-game generates random dungeons with monsters to fight. (Thanks for the tip Zoomander!!) Items obtained from DS dungeon crawling can be transferred back to Tales of Graces. The mini-game even has a multiplayer mode where up to four Kamenin can link up.
Tales of Graces comes out in Japan this winter.