I've always wanted the ability to see the modified date (alter procedured) of a stored procedure.
Recently "SQL Cricket" - Rick Mcintosh, showed me a Dynamic Management View (DMV) that shows you the modified date of a stored procedure. In SQL Server 2008 you can add a column in object explorer to see this (date modified), though in sql server 2005 you can not add columns in object explorer, but the DMV works in sql 2k5. Too bad it doesn't work for all other objects, like tables.
So get your SQL2K8 Management studio up and running, it provides more information, even for sql server 2005.
DMV is below. Thanks to "SQL Cricket".
SELECT name, create_date, modify_date
WHERE type = 'P'