Yes, this would be very appreciated, to have a e200-targeted WIndows-based GCC/G++ toolchain!
Eclipse integration is not even necessary, good IDEs are freely available and we have already a decent debugger (Lauterbach TRACE32).
I am looking forward to "modern" C++ support (like C++11 in GCC3.9), and would easily do without anything else except barebone support like the classical CodeWarior __ppc_eabi_init.c initialization files.