Apple will need to execute flawlessly. In units built and shipped, the iPhone launch will dwarf anything Apple has attempted. It plans to have 3 million iPhones ready for sale on June 29, two sources say. (Apple won’t comment.) And with its touch-screen keyboard, powerful battery-sapping processors, and a panoply of new applications, the iPhone is far more complex than the iPod. Glitches could lead to costly recalls and returns if buyers find the phone buggy or confusing. [[(dead link) via (http://www.businessweek.com/technology/content/jun2007/tc20070606_154290.htm?chan=top+news_top+news+index_top+story)]]