Open source software seems to be becoming a buzz word and increasingly more trendy with mainstream companies.
The DesMoinesRegister.com is running an introduction to open source, as if anyone who visits my site will need it. However it's a nice little read . In addition, LinuxElectrons has a nice article  on some of the things companies should consider when making the move to oss.
UPDATE: Here's  a simlar article on the LinuxInsider featuring quotes from Joe Cooper, CEO of Digital Defense.