I just posted a pretty cool reader submitted macro over on VisualStudioHacks.com. Kevin wanted a little more than the Type Finder macro in the book offered so he wrote his own. Here is a brief description of the macro in his words:
"This macro will search through the major assemblies in the Global Assembly Cache (GAC) to find the type name selected in the text editor. If the type is found, the fully qualified type name will be expanded in the text editor and a reference to the containing assembly will be added to the active project (if it does not already exist). When more than one type name matches the search text, a dialog box will be displayed with all of the available choices from which the programmer may select the correct class."