Yep. My bluetooth mighty mouse (love that name) looks like it has one button and a scroll wheel, infact the left/right clicks are still different, it might be "one unit" but you just click a different part of it.
Lots of new Mac users miss the fact that OSX often ships with the left/right click setup to do the same, so they just think it is a one button device. It is not.
: Infrastructure Architect, Denver CO