I just got the Wii and Wii Fit for my wife for her birthday (SERIOUSLY! She wanted it more than I did!). We played until 1 in the morning the first day! Got hooked on the Challege games (Bowling strikes is cool, it adds one row to the back every shot, until you are going for 91 pins the last shot!).
We rented TW 08, that was the latest Blockbuster had at the time. What we didn't like about it is that you have to pass the remote back and forth. Does TW 2010 support two remotes?
Also, look at monoprice.com for all your accessories. I bought the component cables, a two-controller charger with two battery packs and a skin for the nunchuck and controller for $18.60 shipped. You can buy most of what you need from them.