Just today, Apple seeded iOS 8.2 beta 2 to developers for beta testing. This new beta version of iOS 8 came out just about 3 weeks after the seed of the 1st iOS 8.2 beta, which as a matter of fact also included a WatchKit SDK for developers to discover and use.
Notably, iOS 8.2 beta 2 also was rolled out exactly a day after the public launch of iOS 8.1.2, which was launched yesterday to fix an issue with ringtones getting deleted themselves for users.
The new beta even comes with some bug fixes and stability enhancements.
However, iOS 8.2 is believed to be available for the public in the start of 2015.