EllenGottesdiener has a pretty good article on CollaborationPatterns:

wallOfWonder
* http://www-106.ibm.com/developerworks/rational/library/content/RationalEdge/nov01/SpecifyingRequirementsNov01.pdf

Here's another article:
http://www.sdgnews.com/archives/2000/sd2000es/sd2000es005/sd2000es005.htm

Quote from second article:
"According to Gottesdiener, collaboration patterns are collections of reusable techniques and activities (such as tasks or actions) that can be used by IT and customer teams in a group setting to work together more effectively. Goals of collaboration patterns include defining project scope, user requirements and ongoing process improvement."