A soda store that won’t sell Pepsi or Coke is like a software vendor that won’t sell Microsoft or Oracle.

Why we have invited someone that, 'can't do email', to talk at a software conference.

http://thebln.com/2011/09/a-soda-store-that-wont-sell-pepsi-or-coke-is-like-a-software-vendor-that-wont-sell-microsoft-or-oracle/