The work on the Locale Kit as part of the Summer of Code has already started :) This week we have been working on proper integration of my work in the Haiku tree. So you can now checkout Haiku from svn and get the Locale Kit as part of it. Of course, some parts are still broken (or not yet written), but some of the tests seems to be already working.
This is a companion discussion topic for the original entry at https://www.haiku-os.org/blog/pulkomandy/2009-05-03_locale_kit_status_update_n1/