Yesterday I went to a "A new approach to licensing" a Profoss conference about open source licensing.

Even though most of the speakers were lawyers (speaking a funny kind of English), I did learn quite a few things:

• "Distribution" has a different meaning in US law and European law.
• The real power of the EUPL is that it shows the growing political/economical importance of free and open source software.
• Licenses that have compatibility clauses might have loopholes to relicense something with a more permissive license. For example: 1000 lines of EUPL + 1 line of GPLv2 results in 1001 lines of GPLv2 which means you've lost the Affero-specific clauses.

Bruno Lowagie, the author of iText, gave a very interesting presentation about his struggle with software licensing and how the inclusion of iText in the Eclipse Callisto simultaneous release helped him to clean up dubious pieces of source code.