The Portal 2 comic has been posted online today for your enjoyment and pondering.
It's sort of a filler piece that "explains" what has happened between Portal 1 and 2. Remember all those crazy writings and paintings you found on your way through P1? The story is told through the eyes of the author of those scribbles. In any case, you can find it here at IGN for the low low price of free.
Replies
http://www.thinkwithportals.com/comic/
http://valvearg.com/wiki/Aperture_Science_Login_Screens/Images