I:

-AllLibrary (Limit to only documents of library wide interest???)

--AllShare? AllEdit?
------Budget
------Campus
------Computing
------Forms
------Library Resources
------Planning
------Policies
------Projects

--LibDocs? AllView?
----Budget
----Campus
----Computing
----Forms
----Library Resources
----Planning
----Policies
----Projects 

-InterDepartmental (a place to keep stuff that's interparmental but not of library wide interest--might help keep some of the junk out of allshare)
-----Special Collections/Admin
-----Acq/CM

-Departmental
------AcctRcv
------Acq
etc. 

-Committees
-----Cheers
-----CDMWG
etc. 

-Miscellaneous