I just saw something on the local news this morning about the after Thanksgiving Black Friday ads being leaked onto the web early. I google'd it and sure enough they are online for BestBuy, Circuit City, etc. There are some decent deals there (42" Plasma EDTV for $999.99 at BestBuy, Syntax Olevia 27" LCD HD-Ready TV for $499.99 at Office Depot, etc.).

Here is a link to them:
http://www.keepcash.com/blackfriday/

They have ads for:
Ace Hardware, BestBuy, Circuit City, CompUSA, EBgames, Express, GameStop.com, Ikea, JC Penney, KBtoys.com, KMart, Kohls, Linens-N-Things, OfficeMax, Overstock.com, Radio Shack, Sears, Staples, Target, Toys R Us, Walgreens, and Walmart. :)