Should we put all Lookup requests in one controller.xml?

[Leon Torres]

Hi folks, I saw that an <include> directive is possible in controller.xml and 
was wondering if we should put all the Lookups like LookupProduct in one xml for 
convenience.  This will allow applications to take advantage of all available 
lookups in the system without having to duplicate the request and view maps.

It would be nice to start organizing all these requests. :-)
- Leon