Why was the send button blue for part of the 2007 keynote? I never owned an iPhone until a few years afterwards, which was iOS 3 by then (3.1.4 Jailbroken was my life). I had a first gen iPod Touch, but of course couldn't send texts.

So can anybody explain why it was blue? Was it a US only thing that I couldn't have seen?
Or.. was Apple already testing out iMessage?

On that note, it's pretty amazing to watch everybody gasp when they see the first iPhone. That in itself is a Whitenoise post! You'll see the best moment 21 minutes in: