CAML.NET IntelliSense project
MVP John Holliday has extended the wss.xsd schema to provide a rich CAML IntelliSense editing experience. By furnishing the out of the box schema with additional xs:annotation and xs:string, the IntelliSense now provides descriptions for each of the elements (from the SDK) and optional attribute values.
I highly recommend use this schema when developing your SharePoint features definitions.
The CAML.NET IntelliSense comes as an .msi installer to make your life even easier.
Thanks again to John Holliday