Jay Pfaffman, an instructional technology professor from the University of Tenessee recently wrote an excellent piece which appeared on the LinuxInsider site entitled, It's Time to Consider Open Source Software. As can be expected, this generated a fair amount of debate and comment on the CETPA (California Education Technology Professionals Association) listserv, which revealed a surprisingly prevalent perspective that using open source software somehow equates to "switching" or replacing existing applications only.
I believe it's important to emphasize to all education technology people (or anyone else, for that matter) that they should not view open source simply as a cheap replacement for something else. There is no need or requirement to switch any core application, business process, etc., if one's organization is unprepared to do so or finds it otherwise unnecessary. However, when an opportunity or initiative is in play, then open source should absolutely be in the mix for consideration. The arguments against doing so simply don't hold up to any sort of honest evaluation.