Hi Andy,
thanks for this nice article.
Just as additional information, a link to BOL which explains when views are updatable and when not.
ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/tsqlref9/html/aecc2f73-2ab5-4db9-b1e6-2f9e3c601fb9.htm
Best Regards,
Chris Büttner