Matt Weir is a security researcher.
At DEFCON 16 he spoke about "Password Cracking on a Budget" alongside Dr. Sudhir Aggarwal.
He has a blog about password cracking.
He loves excel.
https://sites.google.com/site/reusablesec/
http://reusablesec.blogspot.com/
http://www.defcon.org/html/defcon-16/dc-16-speakers.html#Weir