My tank is ready for one, I'm just doing my research before jumping in. Live rock is from a 6 year old tank, live sand is from the same tank. And mine's been setup for over 6 months. I was going to go a different direction, but now I'm going to go with a mixed reef type tank. 2-3 fish, inverts, maybe some softies, and the BTA.
I stopped by the LFS today and took a picture of the BTA they have.....but of course it didn't save on my phone so I can't post it. It looked like it got something to eat overnight and was still eating it when the lights came on. A small part of it was still closed up. I didn't pick it up since I want to make sure that's what it was and not sick. I'll wait until I get back there later this week and see how it looks then.
Steve