We saw OS 18.104.22.1683 leak before for the BlackBerry Bold 9900 and now it is official thanks to SK Telekom. I am not sure who spotted it first but from what I am hearing it has been a relatively solid leaked OS. You can pick it up at the link below:
Warning: This OS will not install on any other BlackBerry besides the one mentioned above. Don’t forget to delete the vendor.xml file located in c:program files>common files>research in motion>apploader to install it on a different carriers device. If you do not know how to upgrade your BlackBerry OS please start by reading this step by step guide.