Open Source Learning Management systems like Moodle and Sakai are becoming an increasingly significant segment of the LMS market. Open Source systems are adopted at all levels from young children to higher education and life long learning. While it is nice to get software for free – the ultimate impact of these systems will be how they change our thinking about teaching with technology. Most of the commercial LMS systems are based on a very structured model of teaching and learning with technology from the late 1990’s. However products like Sakai and Moodle are increasingly pushed to function in a Web 2.0 / Facebook oriented world – where the learning is brought naturally into a student’s multi-tasking and very busy life at the right point in that student’s life. By allowing those that teach and use these systems to have greater influence over the capabilities of these systems – the open source systems naturally evolve toward the real needs of teaching and learning. Having two or more strong entries in the Open Source LMS space insures that both products continue to innovate over time. And in particular there is increasing cross-pollination of ideas in one community that naturally move into another community. Perhaps the Sakai community will think of an innovation first and then Moodle community will improve on it or vice versa. With open source philosophy at the core of the communities developing and maintaining these systems sharing of ideas and innovations in pedagogy is as natural as sharing source code. While each community is very proud of their particular value, these communities tend not to feel that any one community “owns” any one innovative idea.