Sun is about to release Solaris under a new licence called CDDL.
http://www.opensolaris.org/license/cddl_license.html
It is based on MPL 1.1. The differences are listed here: http://www.sun.com/cddl/CDDL_MPL_redline.pdf
A summary can be found at http://www.sun.com/cddl/CDDL_why_details.html
I'm writing an article about it, and I would appreciate it if you could tell me whether CDDL is compatible with GPL and LGPL. In addition, I would like to understand whether a document released under CDDL would be compatible with documentation under GFDL.