This lil ol granny just finished the download with no problems at all.
I noticed the change in direction for the mouse scroll, so went to preferences and looked for a check box. Sure enough, you can uncheck it, and the mouse will scroll just like it used to - for those too lazy to make the change.
Everything seems to be working fine. Now I have to get all my apps organized the way I like them on the Launchpad.
Seems very sweet to me, and I love the new calendar app!
That's a feature, it mimics the way when you pull your fingers toward you, you pull the document downward moving to the top. It's like dragging a piece of paper on the table, when you move your fingers in a circle the document moves in a circle. The gesture was brought over to Lion from the iPad (which uses the Apple iOS operating system).