The O'Reilly Proposals Group liked my idea for Mastering Perl and approved it. It's official once we sign the contracts. Now I guess I have to write the thing.
I've updated my Mastering Perl website and I'm organizing myself. So far the website has details on the mailing list, the public read-only subversion repository (not much there yet), and the del.icio.us links I'm tracking for the book.