Weekend Learning: ALL_ARGUMENTS table

Of course having joined Steven Feuerstein's webinar about creating readable PL/SQL code I knew that I was going to be learning something, but I did not think it would be something that was probably very simple and well known to many people yet I have never had to use it before!  Have you ever had to query the ALL_ARGUMENTS table before?  From the name, I bet you can guess what the contents are but have you used it before?  This was my introduction to it!  Maybe I could have learned about it when I posted a link to the Oracle Data Dictionary, but again this was a first for me so I'm excited to see how to use it in the future.