Version 3.0 of the iPhone OS was released yesterday. People were saying it is only marginally useful for Touch owners, but is a no-brained for iPhone owners. I went ahead and upgraded anyway, knowing that soon enough new interesting apps would force me to upgrade at some point.I've found it to be a bit quicker for some tasks, but there has been one addition that I've read about in any review. When playing a track in Music, you can now make it run at double or half speed. Neat. This will help me to clear the backlog of podcasts I've not got round to listening to.