|There's more than one way to do things|
/me returns from web reconaissance mission..
Perl.com and I think part of CPAN think coopercl |at| sch.ge.com works.
CPAN's author page and the PAUSE author index has clark |at| coopercc.net (changed May 2002 )
The coopercc |at| netheaven.com account mentioned in the latest pod is closed.
Cooper left the expat sourceforge project prior to June 21, 2002 according to a post on expat ML by Fred Drake who runs it now, but does python not perl (refers us to Activestate perl-xml ML)
Matt Sergeant said in January 2003 on perl-xml that Cooper is at his (quiet) website coopercc.net but not doing much perl stuff these days. Cooper does not respond to most perl questions (though maybe he did to Matt S.?) Several people on this activestate thread in the end of January supported his trying to become co-owner of the project.
Cooper's real address (probably equivalent to the coopercc.net address) based on whois is per6 |at| nycap.rr.com, updated less than two weeks ago: 08-Apr-2003. I would not recommend calling him, though maybe if it is too much work for one person and many people are frustrated a new collaborative sourceforge project might be in order? (not me, I don't use it enough)..