RIM has published a posting to their http://blogs.blackberry.com website, which announces the new platform's arrival for their PlayBook device, although this isn't the much anticipated 2.0 version of the OS - only v188.8.131.5285.
This update includes a security fix for Adobe Flash Player, which addresses issues that can potentially affect any operating system that supports Adobe Flash. Whilst there are no known reports of any BlackBerry PlayBook tablets being affected, RIM encourage PlayBook users to update to the newest version of Adobe Flash anyway.
The updated version of Adobe Flash Player is version 11.1 and Adobe AIR is 3.1, whilst there are also daylight savings time updates for time zones in the regions of Latin America, Australia and Central America.
Inside the new OS is an update to Bluetooth and WIFI software to improve connectivity, where some issues have also been fixed around account payments in the BlackBerry App World storefront.
The upcoming version 2.0 of the PlayBook OS has been caught on video here, which reportedly brings in the Android Player that enables the tablet to run Android applications.