I use the Xantech hidden link. Out of the box it controls 4 devices but for a couple of dollars you could replace a couble of the ingle emitters with "dual" emmitters which is basically a "Y" shaped wire that is split with two emmitters running off a single plug.

I have a large LCD and had to get a CFL Friendly version to avoid inteference from the TV. Altogether it works great with no missed commands whatsoever.

Chris