Philly, you are absolutely right! And according to FAA regulations, lithium ion batteries in portable electronic devices must comply with UN38.3, UL 2054, and UL 60950-1. The host system (including the battery), must then comply 14 CFR 91.21 to ensure electromagnetic non-interference, and also comply with RTCA DO-160F requirements for rapid decompression testing. If you'd like to get into details on how the Feds say can use iPads, try browsing through FAA Advisory Circular 120-76B.
Of course passengers still still have to turn off their toys until the pilot in command says it's AOK to play Angry Birds.
So, Apple understands all of this,and they actually had a chance to work with he FAA on a lot of these regulations and policies, which brings us BACK to the topic: Apple has asserted it's compliance via a post on the website, but does any know if Applevhas posted, or will post, the actual test data, or at least a Certificate of Conformity, like they do for all of their other compliance statements?