Getting Strong Names for SharePoint Assemblies

Yesterday I was working with a colleague deploying a custom activity to be used by SPD.  I noticed he was using copy and paste to get the public key token from the Windows Explorer view of the GAC.  I told him that this was really lame and he should expand his horizons....I said that he should use the sn.exe -T switch to obtain this information, and if he didn't like running the command line tool, he could automate the process from Visual Studio by creating an external tool.  So I was going to document the external tool process here but then I found that Scot beat me to it, so go check it out.