Apple has set the groundwork for instant messaging on the iPhone and other touchscreen devices with an application for a patent on a universal interface for real-time text chat services.
http://www.tuaw.com/2008/04/21/apple-files-for-iphone-instant-messaging-patent/
http://www.appleinsider.com/articles/08/04/21/apple_files_for_universal_iphone_instant_messaging_patent.html
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1&p=1&f=G&l=50&d=PG01&S1=20080055269.PGNR.&OS=DN/20080055269&RS=DN/20080055269
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http://www.tuaw.com/2008/04/21/apple-files-for-iphone-instant-messaging-patent/
http://www.appleinsider.com/articles/08/04/21/apple_files_for_universal_iphone_instant_messaging_patent.html
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1&p=1&f=G&l=50&d=PG01&S1=20080055269.PGNR.&OS=DN/20080055269&RS=DN/20080055269
