Apple reached their 100,000,000 iTunes sales mark tonight a bit before 1:30am EDT.
Apple had launched a promotion giving away iPods to every 100,000th song buyer between 95 million and 100 million, with the 100 millionth customer winning a 17" PowerBook, 40GB iPod and 10,000 iTunes Songs gift certificate, along with having their very own celebrity playlist on the iTMS.
[update] The lucky winner is Kevin Britten of Hays, Kansas. A final list of official winners has been posted.