Apple has just released iTunes 10.6.3 that can be downloaded here http://www.apple.com/itunes/

This version strangely does not really have any new features except adding support if iOS 6 Beta. This means that only paid developers will have to use it to access iOS 6 beta, but you can still download it and get ready for when iOS 6 is released for everybody.

If you have jail broken your device you might want to wait a while to check if any problems are reported and seeing as no new features are added it is not really necessary to update anyway.