Virtual Writing Teams

This semester another instructor and I are going to attempt "across-section" collaboration on projects. For a large project pairs or threesomes of students from his writing section will collaborate with pairs from my section of a technical writing course. The goal is to have students experience online collaboration similar to an all-online course, but with with an extensive safety net.

Anyone else work with a colleague to create virtual teams? What worked and what didn't?

We are using a wiki platform for the document and Moodle is the course platform. It is a new adventure for both of us, but we have used Wikibooks and pbWiki for projects in our courses.