Deal of the day: Pinnacle PCTV HD Pro Stick for $40
This USB tuner plugs into your PC via a USB 2.0 port and lets you watch or record NTSC or ATSC broadcasts. That means you can plug in an analog or digital antenna, or connect an analog cable, vcr, dvd player, or other device. The tuner comes with a remote control, a portable antenna, and a USB extender cable.
It also comes with the Pinnacle MediaCenter software for PC. But by all reports this software stinks and you should probably find your own PVR software like Windows Media Center, BeyondTV, SageTV, Media Portal, or GB-PVR.