Following this announcement, Apple has released the Gold Master of iOS 4.1 for developers wishing to further interact with the software update ahead of the final version’s release. As with almost all iOS GM releases, iOS 4.1 GM will be almost exactly the same as the finished product.
In addition to the software update, Apple is also releasing the iOS 4.1 SDK GM for iOS developers. In order to access both files, simply head over to the Apple Developer site and log in with your dev account. And, if you get iOS 4.1 up and running, be sure to let us all know how it works for you in the comments box below!