This volume contains the adjunct proceedings of EWSN 2006, the third in a 
series of European workshops on wireless sensor networks. The workshop took 
place at ETH Zurich from February 13 to 15, 2006. Its objective was to 
present, discuss, and explore the latest technical developments in the field 
of wireless sensor networks, as well as potential future directions. 

In addition to the demonstration and poster abstracts, this volume also 
contains the winning submissions of the Sentient Future Competitions and a set 
of highly commended submissions to this competition.