I was invited to give a talk on Open Source in DIT to a group of students. Link to slides http://www.slideshare.net/roundcrisis/open-source-and-you-5456161.
However here some interesting links:
35 years of Open Source http://vospe.com/2010/09/22/a-brief-history-35-years-of-open-source-software-a/
The Open Source Initiative http://www.opensource.org/
List of Open Source Licenses http://www.opensource.org/licenses/category and more here http://en.wikipedia.org/wiki/Comparison_of_free_software_licenses
Reddit’s Open Source http://www.reddit.com/r/opensource/