I've been saying for a few years now that iTunes, partially because of its seeming ubiquitousness, could turn into an entire banking ecosystem. Take a look at what they have done this week in light of the Earthquake in Haiti. They have set up a page where you can donate, directly to the Red Cross, to the relief efforts that are currently underway in Haiti. (By the way, according to the page, 100% of the money goes directly to the Red Cross... thankfully they aren't taking there 30% cut like they do from App Store developers.)
One day when I don't have a deadline on my shoulders I'll outline my plan for how iTunes could become an entire banking system. Right now, I have to get back to MANY MANY MANY keyframes...
Later.