<u>Update</u>: Following the comment of Jon Galloway
I know that there are other solutions doing this but I was just asked about how to do it today (hey Christine ;) and had this registry file stored somewhere for a while waiting for a blog post.
I started to migrate the Tech Head Brothers authoring tool and portal from Web Service Enhancement 3 (WSE 3) to Windows Communication Foundation (WCF). This is a next step in the integration of .NET Framework 3 in Tech Head Brothers portal.
Till today I was using WSE 3 from the Word VSTO solution to securely publish content to the portal directly out of Word 2003/2007.
As stated in the blog of Frank Arrigo (responsible for all Technical Communities in Australia),
One of the things we will be showing at ReMIX is a preview of Discovery Channel Asia's "Never Miss TV" developed by local digital agency @www. It's one of the first commercial applications developed in Australia using Silverlight.