IPhone 3.0 listings show four all-new iPhone, iPod touch models
appleinsider.com/articles/09/03/19/iphone_3_0_listings_show_four_all_new_iphone_ipod_touch_models
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Tucked within Apple's iPhone 3.0 beta firmware are hardware strings that mention not one but two unreleased iPhone models as well as similar changes in store for the iPod touch.