IntelliSense documentation files for jQuery just got published on jquery.com. This enables great IntelliSense at design-time for jQuery in Visual Studio 2008. It goes without saying that this file should only be used at design-time and never at runtime. For the moment, in order to ensure that, you can include the file from an “if (false)” server code block. We’re also working on a much better solution.
Many, many thanks to John Resig, Scott Cate and Jeff King for making that possible.
UPDATE: Jeff King wrote a great post explaining how to use the IntelliSense file now and once Visual Studio has been patched (patch will sonn be released).