The ELLCC LLVMLinux saga is almost complete. Over the Weekend I was able to boot an SD card image in the Raspberry Pi. Almost all of the executables on the disk, except for the Broadcom proprietary GPU code, has been compiled by the clang based ELLCC tool chain. Most of the userland is based on code from http://suckless.org and is statically linked against the musl standard C library (http://www.musl-libc.org/).
I wrote a post describing the steps I took to build and populate the SD card here: http://ellcc.org/blog/?p=26595