A system that can integrate activities across machines and/or devices is disclosed. The innovation can be used in an "asynchronous" manner that enables a user to move or direct a set of activities and/or tasks within an activity from one device to another. Further, the system can facilitate adapting user interface factors with respect to a particular device such that a user can "synchronously" utilize all devices for the given activities and/or tasks. In other words, the "synchronous" scenario enables a user to share activity information between devices when simultaneously utilizing multiple devices in accordance with a particular activity.