Many efforts are currently go towards networking smart things from the 
physical world (e.g. RFID, wireless sensor and actuator networks, embedded 
devices) on a larger scale. Rather than exposing real-world data and 
functionality through proprietary and tightly-coupled systems, several 
projects suggest to make them an integral part of the Web. As a result, smart 
things become easier to build upon and the scalability and evolvability of the 
Web can be leveraged. In this paper we look at “physical mashups”, were 
tech-savvy create lightweight, ad-hoc applications on top of smart things just 
as they currently create Web 2.0 mashups. We present the early version of a 
mashup framework that provides services for composing things and illustrate 
this by means of two mashup editors.