give it a chance before you start having a go - what is it now, like 6:30am on the East coast still!
It only hit the UK itunes late yesterday - i was looking for it in the afternoon and couldn't find it yet so it must have only got on there yesterday evening/night.
so maybe it'll hit the US itunes later in the day as well
and besides - while it was the live version, it was on rhapsody remember which is US only, so its not like they've skipped the US completely with the charity thing