As usual while waiting for the next release - don't forget to check the nightly builds in the forum.
I have compiled the mingw gcc 4.5.2svn with gcc 4.6 LTO patch, and that means, we can compile many projects with LTO optimization, such as wxWidgets or Qt.Welcome to download.static gcc edition : http://pcxprj.googlecode.com/files/MinGW_win32_gcc4.5.2static_snapshots.7zshared gcc edition : http://pcxprj.googlecode.com/files/MinGW_win32_gcc4.5.2shared_snapshots.7z