I just want to leave a note that I've upgraded my system to OS X 10.9 and Xcode 5, so I'll be changing the OS X builds I provide. The notable changes are:
No GCC builds
Only 10.8 and 10.9 base SDKs supported
I'm still debating whether I should make the minimum target SDK 10.7 or still 10.5
If I do decide to make the minimum target SDK 10.7, then I'm not sure if I'll continue providing C++03 builds (and instead only provide C++11 builds)
Anyway, I'll try to update my build system soon-ish so I can resume regular builds, but I'm quite busy at the moment and can't promise anything.