A BlackBerry 10 UI guidelines PDF, that is made for developers who are wanting to create an app that works well with the new platform, is now available. The document covers all of the possible gestures that allow the user to navigate around the UI as BlackBerry 10
will not have any physical buttons on the screen. Thank goodness! How many times have we heard about homescreen buttons/trackpads failing. Just more thing that won't go wrong in BlackBerry 10.
The document also includes many tips and tricks for design principles, UI framework, patterns, components, and visual style. You can view and download the entire PDF here