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Despite a growing interest in design patterns by the Human-Computer Interaction (HCI) community, an interaction pattern collection that is universally accepted is yet to be found. Such a collection would aid the design of pervasive computing systems, in which interactions occur in both the material and logical worlds. This paper first seeks to define interaction patterns by adopting a model that captures such duality and then considers the challenges and opportunities that non-traditional interaction brings. Some patterns are then reviewed, with examples relating to motion-aware systems. We conclude that the creation of a widely accepted interaction pattern collection is unlikely in the near future.