"Databases are Categories"

Hello, I stumbled across this tech talk: http://www.galois.com/blog/2010/05/27/tech-talk-categories-are-databases/ I was wondering what others in this mail list think about Spivak's thesis. I apologize if already posted. Regards, Vasili [For admin and other information see: http://www.mta.ca/~cat-dist/ ]