The Windows PC Scout is a guided tour with three sections: Laptop 101, Recommendation, and Selection. It currently only does laptops but Microsoft says it will add desktops at some point in the future.
Full Story: http://arstechnica.com/microsoft/news/2009/10/microsofts-windows-pc-scout-helps-you-choose-a-laptop.ars
Full Story: http://arstechnica.com/microsoft/news/2009/10/microsofts-windows-pc-scout-helps-you-choose-a-laptop.ars