This from Sunil Abraham, our colleague in India, who is working on and UNDP/IOSN guide to free and open source licencing:
The IOSN/APDIP/UNDP FOSS Licensing Primer is a brief introduction to
different FOSS licenses, primarily the GNU GPL license. It presents a
summary of issues involved with using the different FOSS licenses. It
offers several scenarios, and proposes a framework for licensing of
government sponsored software. The primer also addresses common
questions and misconceptions regarding copyright and licensing issues.
Please download from here: