Along with the docs for the QNX SDK for Apps & Media 1.1 and the QNX Wireless Framework 1.0, we've posted updated 
documentation for QNX SDP 6.6. You can find the new SDP docs here:

http://www.qnx.com/developers/docs/am11/index.jsp

or with the docs for Apps & Media 1.0 and CAR 2.1:

http://www.qnx.com/developers/docs/660/index.jsp

Many of the updates are in the C Library Reference and the Utilities Reference and are described in their "What's New?" 
appendices. There's also a new document that describes devctl() and ioctl() commands:

http://www.qnx.com/developers/docs/am11/topic/com.qnx.doc.neutrino.devctl/topic/about.html?cp=1_3_1

If you have any comments about the documentation, please post them in one of the forums.