Randy's game meets on random Saturday afternoons, usually 1-2 times a month. Saturday afternoons avoiding those times would work for me (especially if we could convince Randy to join and let us use his gaming-modified basement). Other than that, I am usually free on Sunday afternoons. I no longer have the table and chairs required to host at my apartment, however, and I don't know about rooms on campus.
If you want me to be the DM, it has to be 4th edition. I'm willing to play 3.5, but not if we are going to be powergaming and using a bunch of broken supplements. I try to make most of the battles stressful but winnable, and I only killed the party once in the last campaign (I fudged one death roll and the party ended up winning, so it was close). I'm not afraid of using complicated plots and battle strategies, but I am a little afraid of using existing campaign settings.