Good news for .net developer. That is from what i have found on the web.
On November 21, the vice president of Microsoft's .NET Developer division, Scott Guthrie, announced that his group had produced "great jQuery IntelliSense support" in for both Visual Studio 2008 and the free Visual Web Developer 2008 Express package in collaboration with the jQuery development team. This delivers on his promise, made in September, that such support would be forthcoming. Guthrie's blog post has instructions on how to grab and install the proper hotfix to add this capability.
or read this for simple solution without installing hotfix http://blogs.msdn.com/webdevtools/archive/2008/10/28/rich-intellisense-for-jquery.aspx