LWN.net has commented the recent licensing issues with the Debian/Solaris hybrid, Nexenta.
Read the story here, now that it's available for us all.
When Sun Microsystems decided to release Solaris under the CDDL license, it did so with the knowledge that this code could not be combined with GPL-licensed code. That incompatibility was pretty much guaranteed to create some interesting conflicts at some time. That time appears to have arrived, thanks to the release of Nexenta, a Debian-based system built on top of the Solaris kernel and runtime libraries. How this conflict is resolved may set the tone for how the GPL and CDDL worlds intersect in the future.