In the emerging "Web of Things", digitally augmented everyday objects are 
seamlessly integrated to the Web by reusing Web patterns such as REST. This 
results in an ecosystem of real-world devices that can be reused and 
recombined to create new ad-hoc applications. This, however, implies that 
devices are available to the world. In this paper, we propose a platform that 
enables people to share their Web-enabled devices so that others can use them. 
We illustrate how to rely on existing social networks and their open APIs 
(e.g. OpenSocial) to enable owners to leverage the social structures in place 
for sharing smart things with others. We finally discuss some of the 
challenges we identified towards a composable Web of Things.