Let's be clear here. The Sun division of Oracle is being run by Mark Hurd, who was last seen gutting HP and screwing his staff member. Oracle will kill off all things Sun, either now or later. Solaris and Java are the only things they seem to care about, and both of those are still rather endangered.
Solaris still has some great advantages over Linux--enough to actually keep a handful of people on it despite Oracle. I assume that they're going to get those necessary features into Linux, and then dump Solaris entirely.
We're spending about $12 million to dump all of our Sun applications, as well as most of our Sun gear and Solaris installs in favour of x86 gear (mostly IBM) and Linux. The scary thing is that $12 million is less than the increase in licensing and maintenance costs from Oracle, vs. what we were paying from Sun.
Bottom line: Oracle doesn't want people running Solaris. The more features we get into Linux before Larry gives up and says "screw all y'all" the better.