I have been trying to commit my latest version of Business::ISBN, which supports xISBN, but the SourceForge CVS servers have been down most of the weekend. I got to commit one file today (.cvsignore, whoop-de-do!), and the server went down again
Once I can get this thing into CVS, I can release it, and you can do things like this to get all the
camel book ISBNs (so you can buy them all on eBay, Amazon.com Marketplace, etc, then destroy them to drive up the value of yours
my $isbn = Business::ISBN->new( '0596000278' );
my @related = $isbn->xisbn;
That is really just a wrapper around http://labs.oclc.org/xisbn/0596000278 which returns a bit of XML (which your browser may interpret for you). It is an amazingly cool service.
Even though you can't get this on CPAN or in CVS, I made my working directory available as a gzipped tarball. The version number of the module comes from the CVS branch number, so this one is not incremented, but you can at least play around with it until I can properly release it.