Mobile phones are increasingly able to read autoid labels, such as 
barcodes or RFID tags. As virtually all consumer products sold today are 
equipped with such a label, this opens the possibility for a wide range of 
novel digital services building on physical products. In this paper, we 
discuss the problems that arise when such novel applications are deployed, and 
present a unified system architecture for providing mobile phone-based digital 
services in the Internet of Things, called BIT. BIT aims to be a "single point 
of interaction" for users when accessing the services of a variety of tagged 
objects. BIT also aids service developers and product manufacturers in 
deploying services linked to tagged products, by providing a cross-device 
development and deployment framework. We have used BIT to quickly implement 
nine diverse services in a prototypical fashion, and report on our inital 
experiences with the framework.