I don't know if this qualifies for your list but my company, LANWrights, uses
servlets for teaching courses in HTML, TCPIP and XML. Right now these courses are administered through the Austin Community College. The servlet engine is JRun 2.3 but we expect to upgrade to JRun 3.0 over the Christmas break.
Once that is running we will be converting more functions from Perl to servlets and
JSP.
Bill