O’Reilly announced today that this year’s Open Source Convention (OSCON) drew over 1800 programmers, developers, strategists, and technical staff to Portland, Oregon from July 7-11. For five days, convention goers delved into a program designed to “embrace and extend proprietary software.” Open source software “has gone from being a question mark to an exclamation point,” said OSCON program chair and O’Reilly editor Nathan Torkington.