Heres my setup, with the ps1, dc, xbox, gc, snes, n64 all hooked up. My room is kind of a mess at the moment, and i haven't gotten speakers for my receiver yet. I have my older systems close by as well, for when i want a sense of nostalgia, and my genesis is hooked up to a monitor on the other side of my room.
This tv also has a dvd, betamax, and a laserdisc player hooked up.