I recommend xpra, which is like screen but for X apps (and the apps they launch, i.e. Start xterm and launch stuff from there and the whole Constellation of Win

I recommend xpra, which is like screen but for X apps (and the apps they launch, i.e. Start xterm and launch stuff from there and the whole Constellation of Windows is like a screen session you can attach and detach from), and you can view the sessions remotely and even in the browser!