After installing anyway, get this:
[root@centos-xen-host examples]# perl
cwbot.pl -server
chatter.domain.jw.local -conference_server
conference.chatter.domain.jw.local -user dummyuser -pass 12345678 -
port 5222 -debug DEBUG
2008/10/08 09:50:56 DEBUG (332): new client object.
2008/10/08 09:50:56 DEBUG (338): Set the call backs.
2008/10/08 09:50:56 DEBUG (347): Connect. hostname =>
Net::Jabber::Bot=HASH(0x94fb5f0)->server() , port =>
Net::Jabber::Bot=HASH(0x94fb5f0)->port()
2008/10/08 09:50:56 DEBUG (362): Logging in... as user
Net::Jabber::Bot=HASH(0x94fb5f0)->username /
Net::Jabber::Bot=HASH(0x94fb5f0)->alias
Can't use an undefined value as a HASH reference at /usr/lib/perl5/
site_perl/5.8.8/XML/Stream.pm line 1165.