.:Hotcocoa:.

not the first time, but at least this is from a 17-year-old kid ;p 

“NJ Teen Unlocks IPhone From AT&T Network”

http://sfgate.com/cgi-bin/article.cgi?f=/n/a/2007/08/24/financial/f081724D48.DTL&tsp=1

Hotz himself spent about 500 hours on the project since the iPhone went on sale. On Thursday, he put the unlocked iPhone up for sale on eBay, where the high bid was at $12,600 late Friday. The model, with 4 gigabytes of memory, sells for $499 new.