After going through the magical approval process, I now have a spufs git tree published on kernel.org.
If you're looking to try out the latest work on spufs, just do a:
[jk@pokey ~]$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/jk/spufs.git
As with other git repositories on kernel.org, there's a gitweb interface to browse the tree.
Of course, if you have any bug reports/requests/comments about the code in the spufs.git tree, feel free to email me at jk@ozlabs.org, or the Cell/B.E. open source development list at cbe-oss-dev@ozlabs.org.