Hi, I will be upgrading to the next iPhone. For me, the iPhone OS is very important - since 4.0 was announced there hasn't been much talk about it. Yes, folders are OK, multi-tasking is a little confusing, iAd seems like a pain, changing the wallpaper should have been standard from day one. What are people's overall feeling of 4.0? Will we see any further significant changed through the betas? I can't help but feel a little disappointed.