Prefixing SPs with "usp" seems redundant to me - u - user - it must be a user object, because last time I checked, I wasn't SQL Server - sp - well, it's "CREATE PROCEDURE.." therefore it's an SP!

The remainder of the prefixes, I dislike, as procedures will get grouped together by the type of action they perform, rather than by their region of the system, I generally use:

Customer_Get

Customer_Insert

Customer_Delete

.. etc.