I am new to this forum but so far have found it to be great. When I began reading this and previous threads on jellyfish I knew that this would have to be my first post. About 6-8 weeks ago I purchased an upside-down jellyfish from my LFS. I did research on it before hand and at least had some idea of what I was getting myself into, but for a mere 12 bucks I thought I should give it a try. My jellyfish is still alive, so far, and seems to be doing pretty well. It lives in a 6g nano-cube with live rock, and a few sparsely placed coral frags. When I got it the biggest problem I had was that it would get stuck in the intake of the overflow box. I spent a week making a guard to cover the intake and covered it with the net from an old breeder. Then a couple of times it got stuck between rocks, but they are now arranged to give it access to anywhere without getting stuck. Anyways, the point is, it is still alive and seems to be doing well.
I have a few pics taken with my cell phone(reason for the awful quality) but I will try now to figure out how to post them.