Apple just pushed out a minor iTunes update. iTunes 10.2.1 allows you to sync your iPhone, iPad, or iPod touch to iOS 4.3 and provides improved Home Sharing, the service that allows you to browse and play media from your home computer's iTunes library.
You can download iTunes via your Mac's Software Update utility, or on Windows using Apple Software Update. It's also available at itunes.com.
Thanks, Clint Collins & MacUpdate.