My experience with a Blackberry was that background data (polling, tcp keepalives) were the worst of the battery draining. Unfortunately that kind of stuff woul

My experience with a Blackberry was that background data (polling, tcp keepalives) were the worst of the battery draining. Unfortunately that kind of stuff would work better with a notification API. At one time UNIXes were all about time sharing and quotas. I think bringing some of that back (certainly with different controls and interfaces) would be beneficial.