This is one that seemed to miss my radar during AU2008! The Ideate Explorer for Revit 2009 is a utility which allows you to search, filter and tie up the inter relationships within your model.
As mentioned on the Ideate Website.....
"Ideate Explorer for Revit® 2009 from Ideate, Inc. empowers you to do just that. Explorer gives you an easy, intuitive and profound way to search, quantify and select elements in a Revit model."
More details can be found here.....
