MediaBlab has a brief review of yet another iPod accessory, the Digital Lifestyle Outfitters iDirect. The iDirect is a wireless remote control system for the iPod that has all the basic controls (play, pause, track and volume) on the remote.
According to the review, they got at least 30 feet of usable range from the remote, which should be sufficient for most household, line-of-site purposes.
The iDirect retails for $49.99.