Microsoft Office 365 (Plan P1) are supported. I, myself, created a test “Small Business” account and managed to sync successfully both on WP7 and WP8 devices. This is the way I input my credentials:
On important thing that needs mentioning is that you first need to add this account to the phone accounts (Settings > email+accounts > add account > Outlook) and then try using it in Tasks.
Give it a try and let me know how it goes.
As for SkyDrive synchronization, it is in our plans but for the moment I cannot bind to a specific release date.
the Telerik team
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