Cygwin X
A few weeks ago a coworker introduced me to Cygwin's X server. This was in connection with my gripe that there is no dual-DVI USB KVM currently available that doesn't look like an Altair 8080.
Cygwin X works well enough that I no longer have to have an extra monitor and keyboard on my desk for my Linux box. I just ssh -Y to it in a Cygwin xterm, and run xemacs all day long.
I haven't yet been successful running over anything but a LAN. I don't think it's a bandwidth issue, because X windows never come up.
