Searching DVWP with the Data form web part

How come I've not noticed this before....excellent how to on this http://philwicklund.com/archive/2009/04/11/using-the-data-view-web-part-to-search-a-sharepoint-list.aspx. Which works like a charm. However you'll want it to be a bit cleverer than that . e.g. search as you type so here's how http://zieglers.wordpress.com/2009/09/08/document-library-search-web-part/ in particular if you want to do searching of a contacts list then here's how http://zieglers.wordpress.com/2009/03/01/search-contacts-web-part/