Jobs Gives Developers a Thrill "Jaguar -- due to be released in "late summer" -- will feature some minor improvements on the current version of OS X and several new additions, including an instant-messaging client built into the operating system and a networking protocol that lets computers automatically "discover" each other as they come into close contact. ... The instant messaging, called iChat, is compatible with AOL Instant Messenger, meaning that people who use iChat can chat with people who use AIM."