Hey, just found this section, I guess its time to contribute.
I have a Flashcut system and am very happy with it. It has worked flawlessly, and has very good documentation. The main reason I bought this system was for the microstepping, and the separate signal controller. I can run this from a pII 166mhz laptop with no problems, the signal controller keeps the machine running, even when windows98 decides to go on a coffee break.
The other reason I chose Flashcut was for the 4 axis simulanious motion. After a lot of research, this was one of the few I found that could do it. I put the system together with a Sherline 5400 w/rotary table, and it has been a helluva lot of fun to learn to run.
CNCalchemy