Interesting indeed. It's good that GCC people start eating their own dog food and allow the use of C++. I'm sure this move will bring improvements to g++.
And if they have any issues, they could start compiling GCC with LLVM. I hear Clang's implementation of C++ is pretty fast, and it could help track down bugs in both suites.
That is, assuming that GCC doesn't use a ton of GCC-specific extensions, which I'm fairly certain they do.
