During heavy internet lag (ISP was having issues, major latency) Yahoo Messenger would take a LOT longer to launch, several bounces on both macs (intel and ppc). Send text messages in real-time to your friends on Yahoo! Mac Messenger still erases address book entry for a user added to buddy-list whom an entry already exists for on address-book server.
Yahoo instant messenger also includes a security feature which allows the user to be ‘invisible’ to whoever they choose. Mail, where users can be automatically notified when they receive new email.
