It sure would be nice to have a binary version of Tomcat 5. I tried building it this morning, and the process is still going - you have to download about 5 different libraries (so far) just to get it to build! I find this is typical with Jakarta project. Hopefully there will be one soon. I'll try to document the process so others don't have to experience my pain.
Later: Lance provides a link to the nightly build - exactly what I was looking for!
1 Hour Later: Tomcat 5 throws all kinds of errors when starting and doesn't load jsp-examples or servlet-examples correctly. For error details, check out my posting to the tomcat-dev mailing list.