Radio shack has a video/audio sender and I use the X10 one, but I keep the units very close because the link is subject to interference.
Here's another one _> http://www.ramelectronics.net/html/wireless-avw-1000.html but you get the idea.
I don't know if this is a good idea since you will see some video quality loss.
I have a Plasma TV hanging on the wall above a mantle. Is there a way to connect components (DVD, Digital Cable, Xbox, VCR to the TV without wires. Maybe a wireless connection that can be hooked to the back of the TV and reciever?