Apple has released updated version of iOS 4.1 for latest iPhone and iPod touch screen versions. The update resolves various bugs in previous iOS 4 version. Download is available via iTunes for iPhone 4, 3GS, 3G and iPod touch.
iOS 4.1 includes patches for iPhone 4 proximity sensor, Bluetooth issues and iPhone 3G performance issues.
New features introduced in this version includes new game center for multi-player gaming, ability to take HDR pictures and upload High Definition videos to YouTube.
Next version of iOS 4 is scheduled to for November 2010.
Source :- TheAppleBlog