Hi,
while working on my master work, I came over several interesting CSCL topics..
huge work is done by G. Stahl:
http://www.cis.drexel.edu/faculty/gerry/cscl/index.html
though I'd like the book to be shorter and more exact, but it analyses CSCL well, and what I like most, gives some schemes:
http://www.cis.drexel.edu/faculty/gerry/mit/ch09.pdf
The author also touches knowledge management, whitch is one of buzzwords theese days, and in moodle we do experience knowledge building, but itisn't stressed out in moodle's phylosophy. Don't You think it would be worth..