Ian Murdock had a lasting impact on the Linux community in his creation of Debian–a project that has brought many (including myself) great utility. He also did great work with Project Indiana and OpenSolaris, though I’m not very familiar with those.
For the curious, page 10 (page 2) of the coroner’s report suggests that the cops beat the shit out of him prior to his death.
Stay safe out there folks. :(