How can I chat with a friend in realtime (possibly across the Internet)?
If you have a Gmail account, you can chat right inside your inbox without installing any application. Yahoo also has the same service.
Gmail has even introduced live video chat directly inside your inbox in addition to Buzz, where you can exchange updates with your friends, again directly from your inbox.
Note: Since cosmic.swau.edu’s not up anymore, now you’ll probably want to use something like Jabber, AIM, MSN Messenger or Yahoo Messenger. • Check to make sure they’re logged in with finger. • Type talk email_address where email_address is your friend’s Email address. • Wait for them to answer. • You can exit talk by hitting control C.