The 14 revised full papers and 15 revised technical notes were carefully selected during a highly competitive reviewing process from a total of 160 submissions (90 paper submissions and 70 technical notes submissions).

Keynote Address.- Assembling the Planetary Computer.- Location Awareness.- GeoNotes: Social and Navigational Aspects of Location-Based Information Systems.- A Probabilistic Room Location Service for Wireless Networked Environments.- Location Information Managment.- Low Cost Indoor Positioning System.- Making Everyday Life Easier Using Dense Sensor Networks.- Tools and Infrastructure.- ICrafter: A Service Framework for Ubiquitous Computing Environments.- Using JIT Compilation and Configurable Runtime Systems for Efficient Deployment of Java Programs on Ubiquitous Devices.- Software Infrastructure for Ubiquitous Computing Environments: Supporting Synchronous Collaboration with Heterogeneous Devices.- Smart-Its Friends: A Technique for Users to Easily Establish Connections between Smart Artefacts.- Applications for Groups.- Integrating Meeting Capture within a Collaborative Team Environment.- A Ubiquitous Service Environment with Active Documents for Teamwork Support.- Digital Assistant for Supporting Conference Participants: An Attempt to Combine Mobile, Ubiquitous and Web Computing.- The Family Intercom: Developing a Context-Aware Audio Communication System.- Panel Discussion.- Ubiquitous Computing and The Disappearing Computer - Research Agendas, Issues, and Strategies.- Applications and Design Spaces.- The Conversational Role of Electronic Guidebooks.- Who, What, When, Where, How: Design Issues of Capture & Access Applications.- Unearthing Virtual History: Using Diverse Interfaces to Reveal Hidden Virtual Worlds.- KISS the Tram: Exploring the PDA as Support for Everyday Activities.- Subtle and Public Notification Cues for Mobile Devices.- InfoScope: Link from Real World to Digital Information Space.- Research Challenges and Novel Input.- At Home with Ubiquitous Computing: Seven Challenges.- Privacy by Design — Principles of Privacy-Aware Ubiquitous Systems.- TrekTrack: A Round Wristwatch Interface for SMS Authoring.- A Compact, Wireless, Self-Powered Pushbutton Controller.- Interacting at a Distance Using Semantic Snarfing.- Output.- The Everywhere Displays Projector: A Device to Create Ubiquitous Graphical Interfaces.- UniCast, OutCast & GroupCast: Three Steps Toward Ubiquitous, Peripheral Displays.- Multibrowsing: Moving Web Content across Multiple Displays.- On the Design of Personal & Communal Large Information Scale Appliances.- Serendipity within a Ubiquitous Computing Environment: A Case for Opportunistic Browsing.