Yep. I've got some sort of mental problem, and think that writing the backend is half the fun. The frontend is the other half, and library support is the third half. Compiler writing: Now with 150% more fun, and 97% less utility than any other programming project.
Interestingly, this project doesn't seem to use LLVM, but has a back end of its own.
But I agree, LLVM has made it really easy to write simple compilers that emit fast native code via LLVM.