Speck a reduced in size Arduino? (@ Convivio 2006)
Speck is describe by D.K. Arvind as a possible platform for interaction design systems because encapsulates sensing, processing and wireless networking in a single chip.
Speck is a programmable semiconductor device that enables technology for ubiquitous computing.
Specks and Specknets enable the prototyping of Interaction Systems.
http://www.specknet.org/

Comments
th main issue with platforms is not how much "potential" power they have but how quickly and effectively can you start using them. Making a piece of hardware or software is only 10% of this huge iceberg represented by the work needed to document it properly and build tools to make it useable. Arduino for example is relatively low tech but there is a huge investment in all the rest... community building, tool design and documentation...