It's easier than ever to build Force.com apps that utilize new Platform as a Service technologies such as Apex Code and Visualforce from salesforce.com, and combine them with Google technologies including OpenSocial, Gears, Gadgets and GData technologies. This page provides the latest code samples, documentation, tools, and other technical resources you need to get started.
If you don't already have a Developer Edition account, join Developer Force to get one. It's free and only takes a few minutes. It's easier than ever to build apps that bring together the strengths of the Force.com platform and the many innovative web technologies from Google. This page lists all the resources you need to get started.