Official OS 18.104.22.1687 from SK Telecom has reached the BlackBerry Bold 9900 today. If you have a Bold 9900, get out that USB cord and give your a device a fresh OS. Be sure to let us know how it works for you!
Update: This OS seems to have been pulled by SK Telecom. We will update once link is active again.
Note: The Software Platform and Applications version numbers can be found under Options-About screen on the handheld.