Re: Iron Man 3 Discussion/Photos/ETC.
Here's the wikipedia entry for Extremis which gives a good overview of it.
Extremis is basically a nanotech formula. The first film used the revised origin story Ellis introduced in this arc as well. During the Secret Invasion story...Tony shut down his brain to prevent Norman from accessing the Superhuman Registration Act database which contained all the registered heroes identities...but I digress. It's all in the article.
Chief of Operations
Ignoring the The Last Stand since 2011.