My guess is that it would not work well to add a wide angle lens, because it's likely that the Move's algorithm to track absolute "ball" position relies on a fixed FOV. Changing that variable might introduce an error into this computation so that it would have a distorted understanding of the controller's position.
Having said that - it could be game dependent. Some games might just respond to vectored motion in which case the distorted angle wouldn't matter all that much. Other games may need a more precise coordinate in which case the control interface would be distorted in some way.
Hmm. Now that I've talked myself through it I'm actually curious as to what it would do in various games. It's easy enough to test. Here's a cheap wide angle lens, but I know jack-sh*t about optics so others on this forum can probably point you in the direction of a better lens.http://www.amazon.com/gp/product/B001UE6NGA?linkCode=shr&camp=213733&creative=393181&tag=diabeticbooks