x11, i know you have those OSs, but i was just saying, for the benefit of somebody who might be new to it all and thinking of cygwin, to me it sounds like you get the worst of both worlds.
re: a floppy of unix, i have two floppy OSs, one IS Linux, it's Trinux. It fits on 3 floppies, and you have to install it from DOS (the copy i have anyway), it IS Linux, but it is specifically designed with security in mind, and doesn't resemble a linux that i have tried before anyway.
The only other unix i have on a floppy is PicoBSD, i am sure you have seen the recent thread where i have problems installing it, and VoidMain offers a solution (which i haven't had time to try yet!) but anyway, PicoBSD is a nonlinux unix on a floppy, only including the tools for networking. You will be able to download it from somewhere, failing that, i can email it to you, it's only a couple of Mb.