Thanks Joe for this one:

The Australian hacker has been working on pushing Samba beyond the POSIX world and figuring out what work needs to be done to get Samba to support new filesystems such as XFS, ext3, and Storage Tank. The answer is nothing less than a complete rewrite of Samba's smbd code, which has become his latest pet project. Here's an interview with Andrew Tridgell on his latest Samba rewrite.