Jetspeed currently support deploying to servlet containers up unto Servlet version 2.5 including full support all versions of Tomcat through the last release of Tomcat 6.
The development stories to support this JIRA issue are:
1. implement full support of parsing and rewriting the Servlet 3.0 specification deployment descriptor (web.xml), with the ability to parse the web.xml descriptor for the Servlet 3.0 spec and rewrite the descriptor with the Jetspeed container "infused"
2. add to the build to support Tomcat 7 as a valid option for org.apache.jetspeed.catalina.version.major
3. make Tomcat7 the installer's default servlet container