Communications Central http://www.govst.edu/commcentral/
Links to resources and definitions related primarily to semiotics, interpersonal communication, organizational communication, health communication, and nonverbal communication. From Governor's State University.
Claes de Vreese http://www.claesdevreese.com
Resource for teaching and research on political communication, public opinion, media effects, campaigns, and media and politics.
Text-e.org http://www.text-e.org
The impact of new technologies on reading, writing, scientific communication and publishing. Features ten target-papers and discussions [in english, french and italian].
Melcrum http://www.melcrum.com
Articles on aspects of communication in corporations, including public relations, measurement and change management.