I believe that software, and in fact entire companies, should be run in a way that assumes that the sum of the talent of people outside your walls is greater than the sum of the few you have inside. None of us are as smart as all of us.
Matt MullenwegThe relationship between WordPress and Tumblr has always been pretty friendly: Tumblr's own blog used to be on WP, WordPress.com supports Tumblr as a Publicize option alongside Twitter and Facebook, our Akismet team sends them daily emails of splogs on the service, and there's healthy import and export traffic both ways.
Matt Mullenweg