I think it might be worth continuing a little longer as it is, but then using the service for an open group/lists i.e. a new group - keep this one for ESD so we can be a little more open on here and more focused on ESD/interests of the people here. It isn't difficult to share/add links to other groups/lists. I was thinking of possibly placing all the annotated links on the academic practice part of our website on here in public lists. The RSS feeds david mentioned would be good for updated too.
Also, one thing from the experience so far is that it seems to work better for me when there are enough additions so it doesn't die, but not too many (just right as goldilocks would say). Too many and you get a bit swamped and don't read though properly - I'd guess 5-10 ish a week(?). What do other people think?