Here is a new entry for the list of projects using LLVM.
icGrep is a modern high-performance grep replacement featuring full
support for Unicode Level 1 regular expressions.
http://parabix.costar.sfu.ca/wiki/ICgrep
icGrep is built using the Parabix+LLVM framework for dynamic generation
of high-performance text processing applications based on the concept
of bitwise data parallelism.
http://parabix.costar.sfu.ca/wiki/ICgrep