If you're on "irc.perl.org" and find there are not very many people on the server, there's apparently a server down somewhere since this morning and you're probably on the wrong side of a netsplit . I found that by setting my server explicitly to irc.mangband.org I could make contact with most of the people normally on the servers.
Hmm, as I say that I notice a desplitting at least from one of the other servers, so this might not be necessary now.