Apple has released iOS 4.3.1 for iPhone, iPad, and iPod touch. This release is a bug fix release so there aren't a lot of differences from version 4.3. iOS 4.3.1 does not work on the Verizon iPhone so Verizon users will have to wait a bit. Also, if you've jailbroken your iPhone you'll want to wait until a new jailbreak is released for iOS 4.3.1.
To get the update simply connect your device to iTunes and hit "Check for Updates."
To get the update simply connect your device to iTunes and hit "Check for Updates."