It's still not been launched in the UK, with 16 June down as the date for the BlackBerry PlayBook over here. But on the plus side, we now have an OS update to look forward to when it does launch.RIM has announced BlackBerry Tablet OS v1.0.5, a small evolution of the existing operating system. The big update is likely to be here in 2012. So for now, you'll have to content yourself with performance improvements and more Facebook.RIM has confirmed that the first tablet-optimised Facebook application will come preloaded within BlackBerry Tablet OS v1.0.5, rather than having to go hunt it down on App World. That app itself has also been updated too, with enhancements including video uploading (shoot a video on the PlayBook and quickly upload), Facebook Search improvement, improved access to Pages, message deletion and better news feeds. Check out the BlackBerry site for the smallest details of that. Facebook is certainly the headline act here, but it's not the only improvement. There is now in-app payment support too, which should mean subscriptions and more 'dynamic' apps. By that, we mean apps that offer added levels and depth if you are willing to pay for the privilege. There are also enhancements when it comes to charging, with a warning if you are using the wrong charger and an option to charge even when the tablet is fully powered down.There's also additional language support (French, Italian, Dutch, German, Spanish, and UK English), enhanced video chat, Wi-Fi hotspot detection and headset audio boost. Like we said, nothing life-changing, but nice to have. Don't worry about updating, all tablets at the UK launch will have the new OS when they land in just over a week's time.