Today iPhone users who bought their handset before August 22 can receive their rebate via SMS. If you were an early adopter, go to the Apple website, enter your telephone number and iPhone serial number and you will receive a text message for your $100 Apple Store rebate.
Links:
[1] http://www.fiercewireless.com/tags/iphone
[2] http://www.fiercewireless.com/story/steve-jobs-iphone-rebate-letter/2007-09-07
