It took over a year after release for the iPhone/iTouch SDK to come out... Do you not remember this?
I do. But since Apple already has a majority of the market when it come to MP3 players, they have to be on the ball when they release this. The old Zune had an SDK, so I'm pretty sure they'll have one for this up pretty soon. If they really want to compete with the App Store and the iPod touch, they need to have an App Store that is somehow linked to XBLA or something along those lines. Not to mention an SDK.