Playing in Linux (Ubuntu 9.04) using Wine 1.1.27 and Nvidia's proprietary drivers (first v. 180 distributed with Ubuntu and now 185 compiled separately), Standoff plays very well with all of the graphics features...
...except anti-aliasing. Any degree of anti-aliasing causes the on-ship menus to tear a la scrambled cable (big, black, diagonal bars roll down the screen), and in-game objects (the cockpit, space, ships, etc) are all black. I can tell that the frame rate is very low in-game as well. I would chalk this up to some Wine peculiarity, but my computer's a dual-booter, and it does the exact same thing with anti-aliasing set in XP using ~2-month-old Nvidia drivers.
Just thought you should know about this. Fantastic job on this project, folks! You've helped to reinvigorate a community like I've never seen before.