Tomcat is the most popular app server?
That's what they're saying over at theserverside.com:
The most commonly used Java application server execution environment today is Apache Software Foundation's Tomcat, according to BZ Research's latest Java Awareness Study, conducted in August 2002. In the study, 52.2 percent of all respondents said Tomcat was currently in use at their companies.
"The app-server question response clustered into four groupings, with Tomcat standing alone. Next were the three major commercial Java app servers: IBM's WebSphere, at 29.0 percent; BEA's WebLogic, at 24.5 percent; and Oracle's Oracle9iAS, at 20.8 percent."
Read: http://www.sdtimes.com/news/063/story2.htm.