With the release date of Portal 2 drawing nearer, Valve Software has started an campaign to generate renewed interest in the game with the arrival of the Portal 2 ARG. The clues towards the end of this ARG is hidden accross the Indie games from the Potato Sack Pack, granting access to exclusive pre-release content such as cocept art. You can read about the progress of the ARG here:
http://valvearg.com/wiki/.
EDIT: Portal 2 available for Pre-Load Now!
In the mean time, I'm getting ready to go on holidays, so most likely there won't be any new posts here anytime soon....