I'm likely the last to know, but in case I'm not:

Open WorldCat lets registered users build lists that can be shared with anyone on the Internet. The lists can have notes. See an example I created at http://www.worldcat.org/profiles/dcornwall/lists/204 on tidal power in Alaska.

This looks like a great way to build bibliographies intended to be shared with wide audiences from many institutions. I could see it being helpful in government documents or state depository programs.

Do you see any use for it? If so, what?