Thanks for suggestions - I've looked at some of the lightweight tents in the past (Henry Shires, Six Moon Designs, Golite, etc.) and there are some good options out there. I might just go with a tarp, though, for now. I also looked at the Quarter Dome T1 and the problem that I have is that I think that I might be touching the ends/sides because the interior space is pretty small on that one. I thought about some other one-man options, though.
I'm thinking that the dividend might go to a sleeping bag (limited to what REI sells for this particular purchase) and then start working on upgrading some of the other people suggested gear (tarp/tent, etc.).