[ceramic'cow]

Ok, firstly - new baby. awesome. congratulations, and good luck and all of that.

But also:

GET MOTHERFUCKING MARIO KART WII

it's brill, and the online racing is wicked fun. much more brutal than the single-player so far - my girlfriend nearly threw a tantrum after getting beaten right before the finish line - but loads of fun.

other than that, zelda and mario galaxy (which is also utterly fantastic) I can't really think of any must-own Wii titles. Excite Truck is good, but probably superseded by Mario Kart now.

There's Super Paper Mario which, I believe, is a more traditional style of RPG than Zelda's action style. Other than that, not really sure.

You could always download A Link To The Past off of the virtual console.