Writing compilers is 'serious business'! Seriously though, it's very hard and not really something you just hack about a bit in and then submit a patch. There's a reason most of the developers on GCC are employed by companies such as Red Hat, IBM, Novell etc to work full time on GCC. Also why Apple hired people (like Chris Lattler) to work full-time on LLVM.
No announcement yet.
Reasons Why You Don't Contribute To Open-Source Software