Some features that I would like:

http://www.apple.com/server/macosx/features/mobile-access.html

And a mail server would be nice too. Setting up email through ISP is not friendly


http://www.apple.com/server/macosx/features/mail-services.html

iCal server is a nice idea, but if iCloud does the same, then this would be wasted
http://www.apple.com/server/macosx/features/ical-server.html

I knew it wouldn't be a sped boost