You will be surprised to know I cut my teeth on UNIX back in the 70s. and still use UNIX (Linux debian) as my primary OS. Since VOIP is our main source of income we do what needs to be done to stay in business. check what iptel does to survive and you will once again be surprised. Open source does not imply bad business sense. Also talking about open source, how many of us really support the movement in the area where it counts - financial or otherwise. The true philisophy of open source includes financial and other means of support!