It does some very interesting other things, such as:
- Outlook integration
- ActiveSync push email for mobile devices (may have already existed in Hotmail?)
- large attachments go as links to a Skydrive hosted file
- aggregates multiple POP email accounts (this is basically how BIS on Blackberry used to work - you supply credentials to your other email providers, such as Shaw, Telus, GMail, etc, and it logs in on your behalf and pulls the mail into your Outlook.com account)
The last feature in particular is very powerful - it essentially push-enables all of your various email accounts.
Given that it does Activesync, and I'm hoping/guessing EWS (Exchange Web Services) on the backend since Outlook is supported as a full client, I wonder if other Outlook features like calendar and inbox delegation might be coming down the pipe as well.
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-Scott
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