in reply to Re^2: CGI::Application
in thread CGI::Application

Not all of your business logic (model) is necessarily DB related or should be part of your ORM. You might have to do things like FTP files, perform LDAP lookups and a myriad of other things. If you simply use your ORM in your controller (and a lot of web apps do this), then you've lost the ability to reuse your code outside of your CGI::App controller. (e.g. your boss or marketing dept now decide you need a batch or a SOAP interface to the same business logic, but your existing logic isn't reusable because it's all in the controller)