I felt I needed to add something to this thread...
I have a dedicated home-theater room, and we recently purchased a plasma for use in a hearth room near the kitchen. I installed the plasma, in the worst place for me, above the fireplace. When I built the house I ran RG6 and two CAT 5e cables above each fire place 'just in case'.
With no place to put a DVD player I researched baluns, and found Hubbells A/V line. I purchased two S-video + L/R audio baluns, which are 110 punch-down.
I installed everything yesterday. The first CAT 5 run is about 50 feet from the H/T room to my structured-wiring closet in the laundry room. The second run, from the laundry room to the fireplace where the plasma is, is about 50 feet also.
I put in the Eagles Farewell DVD to test everything. The image quality is about as good as my calibrated Pioneer Pro-530HDi, and the sound quality is as good as I can expect from the built-in speakers.
The plasma is a Panny TH42PX75U. The Hubbell baluns are the IMSR1101OW. ( I paid less than $45 for both baluns and plates locally.)
I will recommend this method to anyone desiring audio/video from a DVD to a remote location where it is simply not viable to place a DVD player near the display.