Share 'Is anyone using MS Edu Live / Google Apps for their school email?'

We are investigating email providers in the event we ever wish to consider moving from our own self-hosted and self-maintained Exchange Servers.   How many schools are using a MS Edu Live / Google Apps for Education setup?  Have you liked it?  Are there any other "cloud" 3rd party email services being used?   Thanks for any input. :)   --Mike