I think most all the games with Wii Fitness help, especially the balance games. There are a couple of caveats though:
1) These are still games. This is not to dismiss the concept, but to remind that success and improvement are still tied to game play and if you stop using it for three months like I did, your initial lack of success does not need to indicate your balance has declined. To my assessment mine had not, despite what may Wii age or scores currently show, more often than not.
2) Primarily the games are geared to a "fine" balance control because of the size of the balance board. Not quite the same as walking. Because of this, I recommend using the Wii Sports games like bowling, golf, and tennis that help develop more gross kinds of balance and coordination.
Overall, I really think it helped me and still does.
Tod