Everything USB reviews the Miglia TVMicro USB TV Dongle for Apple Computers.

Quote:
"Miglia TVMicro isn't the first of its kind, but it is apparently the only USB TV dongle for Mac as of this writing. It is about 40% thicker than an iPod shuttle so you can almost dangle it around your neck.
The remote, on the other hand, is about double the size of the TVMicro. The TV chipset that is very difficult to identify as well as the USB controller make up for the bulk for this over-sized tuner dongle, which fortunately didn't tilt my PowerBook G4 and the new MacBook to one side.
The bundled USB extension cable didn't help much either as it kept disconnecting my TV connection probably due to signal loss or USB power issues. "
Read the full review. More TV Tuners.