I for one am really excited about the imessage, and the whole pc free and wireless syncing. The twitter integration might actually be a nuisance for those who do not use twitter, like myself. I'm one of those people where if I don't use it, I dont need it. So this also applies to the newsstand. A very interesting thing I found was the keyboard splitting.
I just love how they are finally moving their "post pc devices" to actually being post pc devices. The only thing now is more storage for us video hogs who have half a terrabite of data and also being able to view any video on any site thru safari (yes flash...) without having to get a separate app or use a different browser to view them (skyfire). But overall I'm pleased with the news on iOS 5. What about you?
What are you most looking forward to? What do you not like about the update? Anything you just find interesting?