Yes, I agree with Mark.  I'm part of a big university environment.  We would like to use Exchange to do universtiy-wide calendaring.  But it is very difficult to recommend to the powers that be when OWA 'light is the theme of the day for non-IE web browsers.   Only a day view?  Not able to subscribe to other people's calendars?  Very non-intuitive free-busy scheduling assistant? People like using Google & Zimbra calendaring better.  We have a large Windows community but the lack of support  in your product for mainstream browsers like Firefox and Opera has us looking elsewhere.   I remember reading that you would have a more fully featured web interface for Firefox users.  Is this ever going to happen?  We have a hard time selling use of your product to a wide and diverse community without it.