I think the online deals on Black Friday are somewhat the same as going to the stores. However, the idea is to get people into the stores. So I dont think all black friday deals are available online on the actual day of Black Friday. However, on cyber Monday they run the deals they had on Black Friday for the most part.
Last year I found ALL the deals I broke my neck for on Black Friday, were offered again between Cyber Monday and up to two weeks before Christmas. I practically broke my neck trying to get a 32in flat panel TV from Kmart on Thanksgiving day for $399. Only to find the same deal at Best Buy 2 weeks before Christmas. All of the doorbusters I got was offered again a week or two before Christmas.
To make it worst, even after knowing all of this, I still will be out there on Black Friday again this year!!! I think I just have an addiction to Black Friday shopping.