IRC Era Scarecrow did an amazing job on it that covered a lot of enhancements including small string optimization, appending, slicing etc.I recall reviewing his code and it was a Phobos pull once but then it pulled out (for further enhancement? dunno). So definitely suggest you two to get in touch.
I assume you are referring to the code in this thread: http://forum.dlang.org/thread/[email protected] ?
