I read an article yesterday on CNN (I think) that basically said that the so-called Cyber Monday is more myth than fact. Traditionally the best sales are in the three day period immediately following Thanksgiving Day with Black Friday being the best day.

The closer you get to Christmas and the more stock stores have retained, the more likely that you will find another deal. However, I suspect the profit margin on the Sony Readers is so low that retailers won't cut prices much unless Sony reduces the price to them. And most stores are not carrying a large stock of Sony Readers, so that lessens the chance of a good deal.