iPhone doesn't support flash, i was unhappy, even ipad still can't play flash, just like a big iphone.
There are several ways to look at it. The development costs of HTML5, but also lets say for example HTML5 was more efficient than Flash, Google could save a lot of money on bandwidth and/or hosting with regards to youtube.
You can add yourself to the You Tube HTML 5 beta
YouTube - Broadcast Yourself.
Still all the Apple Fan Boys will part with an obscene amount of money for one......Because they will think they are 'cool.' Morons. ;)