here is an interesting article about source code licenses http://gskinner.com/blog/archives/2008/07/source_code_lic_1.html
the author in summary says "I would strongly encourage developers to release shared code under the MIT license." and "I would also encourage developers to petition the owners of their favourite shared libraries to change their licensing to MIT, if they haven’t already." so my question: why not releasing under MIT license or under dual license (as jquery) ?
