You already know that I am not a fan of "Cyber Monday".
That being said, it is a hoot to use Twitter to follow what real human beings (not press releases) are saying about Cyber Monday. Pay close attention to the folks who are excited, and the folks who are frustrated with the contrived, artificial nature of the holiday. Also pay attention to all of the selling that is going on, my goodness. This, folks, is the definition of a micro-channel.
You can learn from actual humans that businesses like Gap, Victoria's Secret, Home Depot, CompUSA and Williams Sonoma experienced slowdowns.