While the videos were published in record time this year finding the sample code on the WWDC web site is no easy task (I may be dumb but I actually couldn't find it at all on the official site). Luckily Johannes Fahrenkrug has managed to find it and put together a useful tool to download it all and store it in well named folders relating to the session name. Great work.
Joseph Lord reminds us all that many of the open source licenses that we use still require attribution and it's something which is often overlooked. On this subject, one of my favourite features of CocoaPods is that it can gather up license files and compile them into both a plain text license attribution and also a plist file which is suitable for inserting into a settings bundle.
Great list of links for iOS development from Dave Mark, he also has a link to a set of essential developer tools about half way through the initial intoduction which is also worth a click. There are a bunch of extra suggestions in the comments as well including some very kind people suggesting this email should be included which I really appreciate.