I remember one of my Silverlight discussions with customers was about if it was possible to allow users to zoom on an image on the web, to see detail of the image. A few months ago, my response was that it would take some custom coding to acquire that kind of functionality. That's not the case any more; such a nice feature is now available in Silverlight 2.0, currently in beta 1 release.
To see what it is, check out my colleague Bob's blog at http://blogs.msdn.com/bobfamiliar/archive/2008/03/06/mix08-silverlight-2-0.aspx
To see the feature in action, check out two sample applicaitons below:
You can download the Deep Zoom Composer at