A Developer’s First Look at Windows 7

This series introduces Windows 7 with an emphasis on those new features that will be of most interest and use to developers. It consists of: two introductory sessions, one focusing on the new user interface, and one on behind-the-scenes features, two hour-long sessions that cover compatibility and security issues, six shorter sessions which focus on coding for a single new feature.
Windows 7 Introduction: The New User Interface | New Features for Developers
Windows 7 Compatibility
Internet Explorer 8 Compatibility
Windows 7 Feature: Taskbar and Jump Lists | Federated Search | The Windows 7 Ribbon | Instrumentation and Performance | Background Service and Tasks | Energy Efficiency