I just went to the web site of a large ed tech conference and was very happy to see a special promotion for all the Open Source activities they are featuring at their conference.
I was less excited to see that many of the sessions they were highlighting as a part of this were not Open Source at all, but instead were focused on Web 2.0. These included UStream, Voice Thread, Google Docs, Delicious, and a variety of other Web 2.0 apps.
OPEN SOURCE DOES NOT MEAN FREE. Open Source means FREE and OPEN. The difference is immense.