The next iteration of Solaris, OpenSolaris, is different from "your grandmother's Solaris", as described by the Sun folks. Watch the video and see what great things are coming in the next few days.
OpenSolaris targets Linux users and based on my experience with Solaris 10 so far, I'd say that they do have an interesting product that competes against Linux. What it does not have, at the moment, is the huge Linux community. OpenSolaris Community is a bit small but it is increasing.
I'd say, don't let this slip under your radar! This is one huge release – see you when they announce and release it in CommunityOne. :D