Modified February 5, 2012
The standard is ISO/IEC 14882; it is available for downloading from the National Committee for Information Technology Standards Electronic Store. The cost is (as I write this) US$32.00 payable on-line via credit card. It is available as a book (on paper): "The C++ Standard", published by Wiley, ISBN 0 470 84674-7.
Discussions about C++ and its use can be found in most forums covering programming. The usenet groups comp.lang.c++.moderated and alt.comp.lang.learn.c-c++ are good examples. These groups can be accessed in various ways including Google Groups (sort by date).