Yup, that was me:
http://www.engadget.com/2007/10/15/iphone-report-most-owners-left-treos-sidekicks-behind/
Not surprisingly, iPhone early adopters were “ten times more likely than other new phone buyers to have previously owned a Treo and three times more likely to have owned a T-Mobile branded phone, such as the popular Sidekick model.” When it came to carriers, Alltel and T-Mobile were said to have lost the most customers to AT&T, as consumers who “switched carriers to buy an iPhone were three times more likely to switch from Alltel or T-Mobile than from other carriers.”
On a plane two weeks ago, the entire exit row crowd had iPhones. The new icebreaker question: “Did you buy before or after the $200 price drop?”