Apple has made Wireless Mouse Software Update 1.0 available for both OS X 10.5 Leopard and OS X 10.6 Snow Leopard users eager to add the new multi-touch Magic Mouse to their existing system -- when they become available. That's right, outside of buying one of the brand new iMacs Apple released last week (which include the mouse and the update), you won't find hide nor hair of the new Magic Mouse either at an Apple Retail Store or the Apple Online Store. They're still pending.
If you've already placed your order, however, or are staking out your local store in anticipation, at least you know Apple has you covered while you wait. (Though whether that means 10.6.2 isn't as close to shipping as we hoped is anyone's guess....)
For what it's worth, I had a chance to try a Magic Mouse out a few days ago and, yeah, I want it now as well.