yup yup, it is this stand here, the 29 gal
variety - Aqua Culture Deluxe Aquarium Stand - Walmart.com
here is a picture of it with the door closed, and the door open, as you can see, the back is open, it is not entirely square, it has 2 side pieces, 2 pieces that are at a 45 degree angle and the door.
if I wanted to pull it out from the wall I am wondering if I would be better off getting something like - Petco Brooklyn Metal Tank Stand - Aquarium Stand and Fish Tank Stand from petco.com
I just looked through the instructions that came with the stand, no where does it say it has to be kept flush against the wall, I am just not so sure i trust it away from the wall with the open back.
**EDIT** after doing some looking around on the walmart site I found a few pictures of people using this stand away from a wall, so I am guessing it would be ok, still makes me kind of squeamish though. here is once such pic - http://walmart.ugc.bazaarvoice.com/1336/30856/photo.jpg