Not much else to say here except for plug in your iPhone, iPod and iPad's and get downloading.
Apple has finally released iOS 5.0 to the world with a very long list of new features (around 200!), changes and updates. Included are the big ones like Twitter integration, iCloud support, improved notifcations, iMessage, Newsstand and much more.
Enjoy! We are sure Steve would have a big grin on his face right now.