Well, I finished Okami. Its definitely a fantastic game, though it does have a few flaws- its storyline, while interesting at point (namely, whenever the character Waka shows up) is extremely disconnected, and it feels like the storyline follows the "sorry Mario, but our princess is in another castle" route (ie, you defeat a bad guy who you're told is the ultimate baddie, only to then find out that there's another even bigger baddie out there). Also, the game is way too wordy for its own good- it always says in ten minutes of cut scenes what it could have in three, and after a certain point I wanted to kill Issun, who half the time is a fairly entertaining character but who otherwise repeats what other characters have said to you right after they've said something to you and explains everything you're supposed to do in the most excruciating detail. And then finally, the game is way too easy. Easy combat is one thing, but when the longest I got stuck on a puzzle was three minutes... Not a good sign.
But anyway, a great 30 hour adventure. The Celestial Brush worked great with the wii-mote once you got used to it (I can't imagine controlling it with a stick), the world huge and well built, the art beautiful and the game just fun in general. I definitely recommend it- 8.5/10.
Edit: Oh yes, and this game is so similar to Zelda: Twilight Princess in so many ways. I'm convinced they had the same team making both games. Or that one game stole all its ideas from the other.