Well almost a year ago....I saw the apple website and saw that tethering is coming soon to the iphone 3GS but it is NOW 2010! and at&t still does not provide official tethering services...... I wonder if they forgot....or the iPad is the big buzz in at&t right now that they put the tethering aside and concentrate in keeping the iphone and iPad w/ at&t "3G" services. 
https://forums.macrumors.com/threads/595933/
this thread is from November 2008.
a LONG time ago.
https://forums.macrumors.com/threads/595933/
this thread is from November 2008.