This talk will give an overview of research activities in wireless sensor networking at the IBM Zurich Research Laboratory. We develop and prototype wireless network protocols, messaging middleware, and low-power sensor platforms to connect sensors & actuators with IBM enterprise computing. A particular focus is on publish/subscribe messaging protocols which offer unique advantages, e.g. for resilience and scalability, and which facilitate the deployment of applications across heterogeneous wireless sensor networks. Our goal is to enable `end-to-end` solutions, e.g. for asset management, logistics applications, or utility metering. In addition, we are working on location-sensing concepts which have application in retail environments (ﾑStore of the Futureﾒ). Finally, we participate in EU-funded Project e-SENSE exploring the use of sensor networks to capture ambient intelligence for B3G mobile communication systems.