Feature List Tomcat 4.0 vs. Tomcat 3.x

[marc . lehmann]

Hi,
Could anyone point me to a feature list Tomcat 4.0 vs. Tomcat 3.x. In order to drive 
our development decisions in the right direction I need to know what additional 
features Tomcat 4.0 offers compared to Tomcat 3.x. Is this or will this be part of the 
forthcoming Tomcat 4.0 package?

Thanks
Marc