moka5 has added a Tomcat virtual appliance to their listing.

Ubuntu 7.04 (aka Feisty) Server Edition (i386/32-bit) with Apache Tomcat and Sun Java Development Kit pre-configured and ready to use.

Support available from Virtual Appliances (http://virtualappliances.net)

Default login/password is root/root.

You can download it, here. 

View the README, here.