I've (mostly) moved libgit2 to repo.or.cz (thanks Pieter for releasing the mirror, thanks Pasky for the free hosting!):
http://repo.or.cz/w/libgit2.git git://repo.or.cz/libgit2.git
Thus far its able to format and parse SHA-1 strings, and read loose objects from a repository. It also doesn't compile on Mac OS X as the Mach-O file format doesn't support the use of __thread declarations on variables...
-- Shawn.