Open Source for Administrative/Enterprise Systems

Interest in Open Source for application software has been high over the last year or so, and the success of infrastructure software such as Linux and Apache has fueled interest. So why are institutions moving toward open source? Who is doing it? Will it save money or cost more? Can our community sustain support for open source software? What issues are unique to using open source enterprise systems for administrative functions? Bring your questions and experiences to this timely conversation.