Figured I'd post this item I just bought on ebay, because it may solve a lot of the issues we've discussed for months on this huge thread below:

http://audiokarma.org/forums/showthread.php?t=84545

For $28, you can wirelessly transmit any source up to 500' on UHF channels to all the NTSC TVs in your home.

Once the analog cut-off hits 2/17/09, these might be harder to find.

Here's the store I found them in (and have been looking for a while). Seems most of the other modulators I've seen require hard-wiring or a special receiver box. This one doesn't:

http://stores.ebay.com/2FastTodd_UHF-Video-Transmitter-Sender_W0QQcolZ2QQdirZQ2d1QQfsubZ2QQftidZ2QQtZkm