Apple Watch Kit Released
The much anticipated WatchKit arrived from Apple this week in the form of Xcode 6.2 Beta. Once downloaded and installed you can start building those watch apps! Plenty of supporting files by way of documents and video from Apple, here are all the links.
Apple WatchKit Developer Portal
Xcode 6.2 Beta including iOS 8.2 SDK with WatchKit
iOS 8.2 Beta in the Dev Center
WatchKit Resources from Apple