According to this News.com article, Linus Torvalds hinted that OpenSolaris might push the Linux kernel to adopt the General Public License version 3 (GPL3). Additionally, Linus has reservation regarding Sun’s sincerity towards open-source software. A copy of Linus’ cynical email is here.
On June 13, Jonathan Schwartz responded to Linus’ reservation with an an invitation for dinner at his house and for the possibility of a Solaris/Linux mashup. More information on Jonathan Schwartz’s invitation is located at his blog and another article from News.com regarding the issue.