I'm happy to report I got my USCutter MH871 today. I'm running OSX 10.6.7, illustrator CS5 (convert to eps), and SignCutPro. Straight USB with the com port driver from the sticky. I have run four different cuts with out a problem.
Just thought I'd put it out there to let other new people know how it worked out for me.
Thanks to all that post. It helped me make my purchase.