iChat allows users to collaborate in real time. iChat users can use the following features to quickly share information without the delay associated with email messages and wiki posts:
• Exchange text messages instantly.
• Send files to each other.
• Set up an instant audio conference (using the microphone built into many Macs or an external unit).
• Initiate a face-to-face video conference using video cameras (including the iSight or FaceTime camera built into many Macs).
• Allow another iChat user to take control of their Mac (using screen sharing).
• Use iChat Theater to share many kinds of documents, including text files, PDFs, photos, QuickTime movies, Keynote slide shows, and iPhoto albums.
Unlike a telephone ...