ABbC -- Australasian Blackboard Community List
http://listserv.uts.edu.au/mailman/listinfo/abbc
Hosted by the University of Technology, Sydney this site provides an archive of the list, and gives instructions for signup.

Blackboard Listserv
http://lists.asu.edu/archives/blkbrd-l.html
Hosted by Arizona State University, this is perhaps the largest and most popular Blackboard-related Listserv, frequent visitors include system administrators, instructional designers, technologists and more.

Blackboard Administrator Listserv
http://lists.asu.edu/archives/bbadmin-l.html
Another Arizona State University hosted Listserv specifically for Blackboard Administrators.

Blackboard Content System Listserv
https://lists.princeton.edu/listserv/bb-cs.html
Begun in August 2004, this listserv is hosted by Princeton and is designed specifically for Blackboard Content System users.

Blackboard Faculty Support
http://www.miami.edu/bb/bbfs
This site, created by the University of Miami, is for the community of professionals who support faculty members in their use of the Blackboard Academic Suite.

Blackboard Foreign Language Listserv
http://www.duke.edu/~ssearp/bblanguage/
Hosted by Duke University, focuses on the use of foreign languages and foreign characters in Blackboard.

Blackboard Open Source Developers
http://www.bb-opensource.org
Website for Building Blocks developers interested in developing Open Source Building Blocks.
Hosted by Virginia Commonwealth University

Blackboard Transaction System Listserv
listservrequest@blackboard.com
One of the most enduring and popular Blackboard Listservs, this Pennsylvania State University hosted list is designed for Blackboard Commerce Suite clients.

Instructional Designers Listserv
Another very popular list hosted by William Patterson University. While there is no homepage but the subscription e-mail address is:
Bb-ID@list.wpunj.edu
 
United Kingdom Blackboard User-Group List
http://www.jiscmail.ac.uk/lists/blackboard-usergroup.html
Hosted by the JISC (The Joint Information Systems Committee) and supporting use of information technology in higher and further education.