This little tool missed me - hence I am guessing it missed others. If you are running Beta 2 and would like to send us feedback then we have a small tool which adds two icons to the notifications area of the taskbar over by the clock: a happy face to click when you want to give us positive feedback and a sad face to click when there's something you don’t like.
I am personally finding it very calming :-)
Check out http://blogs.msdn.com/jensenh/archive/2006/05/26/607768.aspx or download the tool direct http://www.microsoft.com/downloads/details.aspx?familyid=A2E1F4E2-BC0F-4403-B09F-7A677D55F274&displaylang=en
P.S. For Windows Vista, check out http://www.microsoft.com/windowsvista/sentiments/default.mspx