What happens when you take the most utilized business communication tool and team it up with Hotmail as the mail backend and sell that as a subscription? Outlook Live.
This is a pretty cool service! You can use Outlook and have all your mail, contacts, tasks, notes stored on Hotmail. Your data roams and you can access it anywhere. I've been using this for the past few months and love it. It makes Hotmail as my primary non work account really slick. Furtheremore, if you don't own a copy of Outlook 2003, it comes with the subscription.