It took a few hours, but iTunes 10 is now available for download on Apple's website. We are playing around with it and will be doing a write-up with that will help newer users find their way around the software.
So far, it seems to be working well. We won't know for sure until we put it to real use, but we are very excited about Ping. We will definitely be playing around with it. Note that we tried to update through iTunes via the Software Update option, but it wasn't available yet. As of the time of this writing, you have to go to Apple.com: Here