With the latest post-beta 2 builds, Microsoft has included new Aero cursors that are not turned on by default. Follow the steps below to use the new cool looking cursors:

1. Right click on your desktop and select Personalize.
2. Click on the Mouse Cursors item to select a different mouse cursor scheme. 
3. Change the Scheme from None to Windows Aero. 
4. Click OK to see the new Aero mouse cursors.

Enjoy the new cursors!