You can start with www.bf2004.net. I usually never go to these "sales" on Black Friday. I think it's nuts. Most people just end up buying stuff they otherwise wouldn't have gotten anyway and think they "saved". This year, I will be going however. Sears is having 20% off Kenmore product and I need a refrigerator. Outside of that, I don't see myself braving some of those nutty mall crowds.
Just bought a 53" HD ready TV - Panasonic PT-53X54 HDMI for $947 plus tax. It's a traditional 16:9 CRT rear projection. CompUSA had a 1 day only sale (more like bait & switch since every store only had 1-2 available) for $999. I took the ad to Sears and after some wrangling, they matched the price and gave me 10% of the difference ($52).