Apple has just seeded Beta 2 of OSX 10.9.2 Mavericks, with a build number 13C39. This comes a month after Beta 1 Build 13C32 was seeded.
All registered developers can update through the Mac App Store, and it is also available through Apple’s developer portal. Beta 2 has some new features, for example the ability to block people in Messages and FaceTime, and the best part is you can sync your Blocked contacts from your iOS 7 device to the Mac so they have the same numbers.
If you find any other features definitely let us know in the comment section below!