TLT has a blog that is devoted to Moodle - "Moodle Musings". Be sure to keep an eye out on that blog as well!
Cheri has some neat ideas for collaborative environments and activities in a recent posting. In particular I thought the idea of setting up a forum for anonymous questions was something that would be really useful. I haven't checked out that feature yet but I would assume you'd want to set it up so that you approved the anonymous postings before they actually got posted.
http://blogs.elon.edu/technology/category/teaching-and-learning/moodle-musings/
