I think what I really need is a reference: What can you do with REQUEST? RESPONSE? AUTHORIZED_USER? It looks like when you say <dtml-var "something"> it's plain Python. What's the context? What do I need to do to call some function in a product class? What about a function in a class under some other folder (ie. corresponding to some arbitrary URL)?

From a product class function, is there a way to do a server redirect?

What should I use for managing users (seems to be GUF, LoginManager, maybe others)? How about a threaded message board? There seem to be a number of products planning not to continue from their current codebase. Can anyone explain ZClasses? Where's all the code? Is that the future of Zope? Just hoping to find the road. Thanks a lot! Adam