Here's hoping other product teams follow the DPM team lead and post their error message catalogs. Kudos to DPM team.
Others who downloaded Data Protection Manager 2006 Error Code Catalog also downloaded:
Now if there was just one website that had searchable, filterable list of these things...
Wait a minute..looks like a start has been made http://www.microsoft.com/technet/support/ee/ee_advanced.aspx