Welcome to USB HDTV!
Have been using Sasem tuner for about a year.
http://www.tomshardware.com/firstlook/20041130/index.html
New drivers add ton's of features not included in above review.
Works great with digital OTA, analog OTA, digital cable (QAM), and analog cable.
Has dual inputs, so you can use both analog and digital at same time.
Full PVR (pause, RW, record live TV) for all digital and analog, HDTV and SDTV.
Has "Game mode" which allows game console to be connected to A/V inputs, disables tuner, and provides zero lag.
Plus much, much more.
Excellent product. (I've tested 5 different HDTV tuners, and this is by far the best, followed by AccessDTV PCI hardware card).
BTW, contrary to popular belief, many digital HDTV channels are in the VHF range.
Here in Tampa area, NBC and FOX are VHF, while the rest are UHF.
Check out your area here:
http://www.solidsignal.com/antennas/dmamarkets.asp
I've tested several special antenna for digital and HDTV, and none work as well as a traditional combo VHF/UHF antenna with channel master 7777 amp.