The most unpleasant news appeared in the news "tent", in short - the USPS suspends, at least until January 2013, the sending by air mail of all products containing lithium batteries.
Under this norm: ipad, iphone, kindle, nook and the vast majority of mobile phones / readers / tablets. The norm comes into force on May 7, 2012.
ProofUPD :
crackedmind reports that a similar situation with the delivery from
JapanUPD2 :
official information on the USPS website