Since the launch of Office365 , I am seeing a great level of interest among the Customers for this service. Personally I believe that in terms of functionality, Office365 is simply mind blowing. I am also asked questions on Competition. To some extent , Office365 faces competition from Google Apps. I did address this by comparing MS Exchange with Google Apps Email in a 30 minute video http://vimeo.com/21836544 .
Have a Great Day !
Microsoft MVP 2009