No, every single A1181 has the same touchpad, that is the one before the Magic Trackpad, so, it has less multouch abilities.
The latest A1181 topcase, on an older MacBook, would just add the iTunes Keys of the latest MacBook Pro, but not a Magic Trackpad-like device.
If your wife is interested to a full multitouch, she can buy a Magic Trackpad. It works with Bluetooth even on every MacBook able to run at least OS X 10.6.4, so, every A1181 ever built (given at least a Snow Leopard update).