When I was starting graduate school back in 1995, I purchased a 6100/66/DOS new. I figured it would help me get through any compatibility problems I would encounter at school. As it turned out, I didn't need the DOS card at all for school. The only use I got out of it was playing Doom!
You might have been dreaming about it - I lived the nightmare! I had one of these boxes at work and it was no end of trouble. From memory the DOS side of things was really under-specced. It was pokey slow running Windows. Transferring stuff from one side to the other was also a royal pain. But, it was better than the VirtualPC alternative at the time!
ps - I'm not sure retromaccers are going to give up a box like this! Maybe worth a shot though - anyone got a spare cube or TAM lying around?
pps - what's with all the aussies here at retromaccast? We'll have to start a group.