We have put in 5 plasma's at the school where I work and we have done a few things with the cables, unfortunately I dont have any pics as we're on holiday now.
Basically we have done 3 different things with the cables (they are all the same model plasma and cables connect on the right hand side):
1. 2 in the restaurant are wall mounted on a bracket straight onto a brick wall, cables are neatly cable tied around the back of the screen to the bracket and then head off towards the cieling in a short piece of trunking. Only 2 cables on these, an RG59 and a power cable.
2. 2 more in the reception area, these are cieling mounted and hang down from a metal tube. Again the 2 cables are neatly cable tied to the back of the bracket and this time head up the metal tube into the area above the cieling tiles.
3. 1 IT directors office, quite a nice install, this has alot more cables, Component, VGA, Composite and speaker cables going to cieling speakers that are being powered by the plasma. Again this uses the same bracket that was used on the two in the restaurant however instead of a piece of trunking (which in this case would have to be huge) the cables were again neatly tied back to the bracket behind the plasma, but then head into the cavity behind the false wall where they headed of to there final destination.
Hope this helps without any pics.
Chris