As per The Ludologist, the 2006 Casual Games White Paper is out, although as of this writing you won’t find it on the reports page for some reason. You can find a copy of it on the IGDA Wiki as well as in PDF form at the Casual Games SIG.
Apparently the wiki format was used to encourage people to contribute to the knowledge base:
Contribute
We have decided to utilize this Wiki as it provides easy access for the entire community to contribute to and update this iteration of the paper. Please feel free to help out by updating any section in which you feel comfortable contributing to!
It should make for good bedtime reading.