[jyl]

Can you recommend a brand, or even specific equipment?

Does it have to be plugged directly into the wall, or can it work through a power strip/extension cord?

In my situation, one end would be at the Apple Airport that is connected to the cable modem. The other end(s) would be at the TiVo, the Xbox, or at a Mac/PC in the study, and possibly a second Airport that is acting as a repeater upstairs.