Oh man...this one hit me tonight! I remember watching Triumph of the Nerds in high school and loving every second of it! I read his column on PBS for years and followed him to his blog later...and kinda fell off as I fell off of so many things. Bob was influential in turning my childhood passion for computers into my career.

It's especially tragic for his family as Bob had announced that his son Cole, aged 21, had passed away back in April. Condolences to all those who knew Mark, Cole, and their loved ones. RIP.