If you are looking for the jquery 1.4.1 intellisense file(-vsdoc). It can now be found on the downloads section of jQuery web site. Here is the direct link for the -vsdoc file for jQuery.

In order to get VS 2008 SP1 to automatically use -vsdoc files with intellisense, you will still need to install the patch (I have previously cover this, but rehash it below).  If you have VS 2010 support is already built in.

Not having the patch will result in the following warning:

Error updating JScript IntelliSense:

Object doesn’t support this property or method @2139:1

You need to download and install the following hotfix: KB958502-JScript Editor support for “-vsdoc.js” IntelliSense documentation files

You can force Visual Studio to update JavaScript IntelliSense by pressing Ctrl + Shift + J.