I don't know what it is company-wide. Among the immediate teams I work with - I am, my boss is, and four of the tech leads for teams I work closely with are. (I'm defining "work closely with" as "would not feel terribly awkward inviting over for a barbecue or board games.")

If you add people who've founded successful open-source projects or done interesting projects as part of a larger organization, that number grows significantly. The founder of Gallery is the manager of a large team I work closely with, and on that team are the authors of Rhino, Parrot, Pychecker, "Linux Kernel Development" and "Linux in a Nutshell", and probably a few that I don't know of because I don't know everyone's pre-Google background.