I know quite a few devs who cannot wait to get their hands on the native SDK for the BlackBerry PlayBook. This is you chance since RIM has just put out a form for developers to apply to be part of the closed beta for the Native SDK. Here is how RIM describes the SDK:
The Native SDK provides you with the ability to create rich and compelling games for the BlackBerry® PlayBook™ tablet using C/C++, the Standard Template Library (STL) and Open GL ES 1.1/2.0. The Native SDK includes a number of POSIX compliant libraries, as well as support for accelerometer, device orientation, and a variety of other functions to make porting your existing games as easy as possible.
The Native SDK includes the industry leading QNX® Momentics® Tool Suite, which is an Eclipse-based integrated development environment. QNX Momentics provides unparalleled memory profiling, application debugging, and memory usage statistics, giving you the tools you need to debug sophisticated programs, including hardware accelerated OpenGL applications. QNX Momentics is designed to provide you with a safe, secure, and powerful environment to quickly and efficiently build applications for the BlackBerry Tablet OS.
Throughout the beta they will be pushing out updates to QNX Momentics to include more APIs for games so things will be in flux. To apply for the closed beta fill out this form, and RIM will contact you with more information. Space is limited in this preview and space will be granted on a first come first served basis. RIM is also working on expanding the beta for anyone interested in the coming weeks. Woot! More details on RIMs DevBlog.