EverythingUSB reports about a DVB-T HDTV Tuner on a USB Stick from Compro.
"Taiwanese company Compro plans to squeeze a DVB-T TV tuner into a size of a large USB stick form factor. Called VideoMateTV DVB-T, the stick could easily be mistaken as a first generation USB flash drive, but it is actually a bus-powered HDTV tuner, which requires at least a 2.4Ghz for just viewing. There's also another version that supports analog, which requires just 600Mhz for TV viewing. "
More details on EverythingUSB.