Pre-release: iTunes (iTunesElevenA1116A9) 11.1.6
This update restores the ability to sync contacts and calendar information to your iPhone, iPad, or iPod touch from your Mac running OS X 10.9.3.
Click Update to download and install the iTunes 11.1.6 seed. Please install this update on a system or partition you are prepared to erase if necessary. As this is a pre-release build, it is not advisable to use this software on a production system with information on it that you depend on for your business. You should back up all of your data before installing this software and regularly back up data while using this software.
Pre-release: OS X Update Seed (SUCabDune13D19) 10.9.3 (13D19)
Click Update to download and install the 10.9.3 seed. You will not be able to revert back to your previous system after updating.
Since this is a pre-release we can expect that a public release will arrive shortly. Please follow iClarified on Twitter, Facebook, Google+, or RSS to find out when it does!