Algorithmic Challenges for Sensor Networks - Foreword to ALGOSENSORS 2007.- Topology and Routing in Sensor Networks.- Codes for Sensors: An Algorithmic Perspective.- Efficient Sensor Network Design for Continuous Monitoring of Moving Objects.- Counting Targets with Mobile Sensors in an Unknown Environment.- Asynchronous Training in Wireless Sensor Networks.- Optimal Placement of Ad-Hoc Devices Under a VCG-Style Routing Protocol.- Analysis of the Bounded-Hops Converge-Cast Distributed Protocol in Ad-Hoc Networks.- Correlation, Coding, and Cooperation in Wireless Sensor Networks.- Local Approximation Algorithms for Scheduling Problems in Sensor Networks.- Assigning Sensors to Missions with Demands.- Maximal Breach in Wireless Sensor Networks: Geometric Characterization and Algorithms.- Counting-Sort and Routing in a Single Hop Radio Network.- Intrusion Detection of Sinkhole Attacks in Wireless Sensor Networks.