Originally Posted by
GrumbleDook
Used and using a variety, but they all have common tools of discussion, blog, document storage / allocation / return and wiki. There are a few other additions such as IM, vidchat / video conferencing (there is a difference), scorm objects, etc. You can, of course, do all of these individually and join them together yourself.
Personally, SharePoint or Moodle ... making sure you work with the right partner on either to get AD integration and/or SSO to other resources.