Outlook + Exchange is the best example of email/calendar integration and group scheduling I've ever used, and I say this as a pretty devoted hater of MSFT. I me

Outlook + Exchange is the best example of email/calendar integration and group scheduling I've ever used, and I say this as a pretty devoted hater of MSFT. I mean, my daily environment is OSX, and I read most of my mail in the native Mac mail client, but I keep Outlook running in a VM to deal with calendaring and scheduling because it's so good at it. There definitely ARE limits to it -- I've never tried to merge personal stuff into my work cal, as you seem to want to do -- but for what it does, it's the best I've seen.