Yesterday, I ported an AppFuse application (based on 1.3) to use all the latest stuff I've done in the last month. Basically, I just renamed and reorganized the directory structure, integrated Spring to bind everything together, and implemented the new Remember Me functionality. If you want to upgrade your (AppFuse-derived) webapp to use Spring, I wrote up an article on how I did it. It's quite a process, but hopefully this article will make it a lot easier. Now I can use Tomcat 5 as my primary app server (vs. Tomcat 4) - sweet!