There's a 24-hour IRC chat channel for PWCs. More info here. Lisa Lorden is your guide. These folks are looking for people wishing to participate in IRC chat . An electronic mailing list is method for a group of people to keep in touch with one another via email.
All mail is sent to a central address, and from there is distributed to everyone on the list.
When a reader receives the mail, he or she has the choice to respond privately to the sender or publicly to the central address, which sends the mail out to everyone subscribed. Subscriptions are open, but only subscribers can receive or send mail.