This was a simple but big 'Ahh HA!' for me.
Often in MOSS development, you need to be able to find the PublicKeyToken of your assembly to reference in a feature or manifest file. I always hated having to build the project and drop the assembly in the GAC just to get the token.
This might have been common knowledge to most people - obviously not for me - but you can use SN.exe to get the token. Just use the -T command.
Very nice!