The use of email, listservs and shared resources has been incorporated in to professional development offerings. The use of sychronous technologies in this domain is still in its infancy. That is using the metaphor of a conference - with rooms, lectures, discussion etc.
Participants can draw diagrams, keep notes etc.
These will be seen by everyone logged into the room. The access can be limited to one other user or expanded to the entire group. Viewing and discussing websites is enabled with the Webviewer. This coordinates a shared viewing of the sites. IN provides a self-guided tour of their site introducing both the tools and the sorts of collaborative interactions possible on this site.