Using the Steam Registry file, Open Steamworks apparently has a listing of titles which will be available during the upcoming 2011 Steam Holiday Sale. This site is dedicated to displaying every game on Steam, and in some cases, before titles are officially announced or offered for a discount. We saw an example of something similar a few days before Humble Indie Bundle #4 was released which turned out to be correct. The listing starts half way down the page and continues on pages 89-92. No pricing or timeline information is available.
Take it for what it is worth. At the very least, we can have fun speculating on what might happen.
Edit: It appears the site has now been locked down.
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