These days, I work mostly in teaching programming to people who usually fail introductory computing, by teaching programming in a media context. See http://coweb.cc.gatech.edu/mediaComp-plan for more info.
Older stuff:
Mark Guzdial researches educational technology and teaches object-oriented analysis, design, and programming at Georgia Institute of Technology:
Georgia Tech
College of Computing
Atlanta GA 30332-0280
Voice 404 894-5618
Fax 404 894-0673
PluggableWebServer, a Squeak-based WebServer with unique strengths at flexibility of CGI scripting. Examples included Web-based Chat, simple BBS-like forum, and SqueakWiki