It looks like when you add a bookmark, you have the option of "submitting" it to this groups as well. I haven't submitted most of my bookmarks to this group - that would just build another "reddit," and we certainly don't want to do that.

I was thinking that the value in this would be the ability to peruse another user's links by username.

It's kind of a pain to get those lists right now . You have to view the group members at http://groups.diigo.com/group/reddit_stopdrinking/members

Then hover over their profile image, go to "more", then click "library."

Maybe it'd be easiest to just submit all links to the group, so that when clicking on the username you see a list of that person's links. (Because it seems to show you the list of submissions to this group, not their entire list)

This is what the link to a user's list of links looks like
http://www.diigo.com/user/offtherocks

I like the tags. Don't like how it's so hard to get to this page via the group, though