There are a number of Black Friday ads that have already been released!
You can see the Black Friday ads for the stores listed below at BFAds.net.
They also have a nice list of store hours for a number of stores including Rite Aid which is opening at 7 am on Black Friday. Head to BFAds.net for the store hours list.
List of Black Friday ads currently available:
Rite Aid: Lots of Buy 1 Get 2 FREE deals and 2 pages worth of FREE after Plenti points deals!
Harbor Freight Tools
Half Price Tools