The final release version of iOS 4 for iPhone and iPod touch has just gone live and is now available via iTunes. It weighs in at 378MB. Remember, you need iTunes 9.2, and if you're running the GM you need to hit Restore as Update will think you already have iOS 4
We're downloading now, and we assume you are too. So we'll be back with more news asap and in the mean time, sound off in the comments and let us know how it’s working for you, how you like it, and what new goodies you're finding.