Wow, and the haters who love to bash MS begin. Ya, exchange, the mature product that does calendering and mail and all your contacts truely sucks. It is much worst then google (oh wait, they don't have a global directory, and email outage, blah blah blah), or Apple .mac (really? that works now?) or mac servers with IMAP.
Google, is not enterprise ready, and is not secure, and will own your data in the cloud. I would perfer my local .gov NOT to use it if my name is going to be on any of their docs.