Here's the original press release. http://www.marketwatch.com/story/united-airlines-launches-paperless-flight-deck-with-ipad-2011-08-23?reflink=MW_news_stmp

Distribution of iPads begins this month and should be done by year's end. UAL's iPads will also feature the Boeing Jeppesen Mobile FliteDeck, an interactive navigation and mapping tool. That makes it more advanced than Alaska's announcement back in June, when it said the iPads would merely be flight manual replacements. http://www.zdnet.com/blog/sybase/heres-why-im-not-impressed-by-alaska-airlines-ipad-rollout/1220

American Airlines is deploying iPads, while Delta is also testing them: http://www.flightglobal.com/articles/2011/08/22/361108/united-continental-eyes-paperless-flight-decks-with.html