Good stuff!
I got BZ mostly working thru wine on Ubuntu Linux and had the same fullscreen problem - going fullscreen causes all sorts of crazy stuff to happen, eventually ending with X crashing. However, as you can see from
this post, I also had problems with:
(a) Not playing the music tracks, despite being able to play the SP missions (i.e. it knew that the disk was there)
(b) Background sound being a little off (some volume difficulties with on of the hover woooshy sounds)
(c) The line 'pointer' missing i.e. the line from the hud to the square on the ground where you're ordering something be built or a unit to go (the square was there though!?!)
Did you get those problems with wine on a Mac...if not then what version of wine were you using?