The first update to iOS 5 is now available for download. iOS 5.0.1 has been released, and will be making its appearance on your iOS devices shortly.
To install the update, launch the Settings app on your iPhone, iPad, or iPod touch, tap General, and then open Software Update. If the update has made it to your part of the world, you'll be able to do an OTA (over-the-air) update of your device without resorting to the old method of syncing it to your Mac or PC.
Here's what Apple says the update will do for your device:
iOS 5