[Zope] Pluggable Brains - Huh?

[Edward Pollard]

Well, I know they have a cool name. But thats about it.

I have a problem that involves returning some data from a zCatalog, and 
some data from a Postgres database. Both items are treated as 
equivalent and should be displayed alphabetically side by side.

I've got a marvelously kludgerific solution that involves copying the 
search results from the zCatalog into a list, which I can then insert 
my SQL based results in and sort as I see fit. I don't know if there is 
a better way, but I'd like to know more about Pluggable Brains so I can 
determine if there is.

A search of Zope.org, and the list archives, comes up empty. Anyone 
with tips or resources?

Edward