This morning on the zfs-discussion and indiana-discuss mailing lists there has been talk about what exactly is the future of OpenSolaris within Oracle. On the Sun domain, Oracle has already published a new web-page stating the end of service life for OpenSolaris.
OpenSolaris 2009.06 is the latest official OpenSolaris release, but even that release is no longer covered under their general availability (GA) support phase without any new release being available. Though at the bottom of the page is a note that Oracle is still reviewing Sun's information and is coming to a decision regarding the product's road-map and future offerings.
As one former Sun customer points out, the subscription link for OpenSolaris has been removed. George Shepard formerly of Sun and now with Oracle has iterated that Oracle is indeed planning on changing the support model for OpenSolaris, but no announcements are yet available.