Just picked up Ghost Rider for PS2. Not a lot of previews, so I was kind of uncertain what to expect. (But being a big fan of the character, I had to grab it.) It plays very much like a poor man's God of War as GR whips his flaming chains here and there with numerous unlockable combos as you play -plus there are some very cool motorcycle driving levels thrown in for good measure. Graphics are nice, storyline pretty interesting, gameplay is pretty much a button smasher.
Worth $30? Only if you're a fan of the character or if you want something to tide you over until GOW II comes out. But once it comes down in price (or if you can find it used or rented at Blockbuster), pick it up for an entertaining diversion.