ArcGIS Server 9.3 (BETA) - SEE THE DEMOS
March 24, 2008 - ArcGIS Server 9.3 (beta) demos are available on the ESRI Resoruces page. LAGIC Demos of the JavaScript API are available here.

ArcGIS Server 9.2 Custom Applications
December, 2007 - The LOSCO Boat Launch & Lift Locator is a custom application that combines a tiled cache from TIGER data and a dynamic Marinas layer.

LOSCO Marinas Demo:

ArcGIS Server 9.2
July 10, 2007 - This ArcGIS Server is a .Net web application that publishes your ArcMAP documents to the web. Like ArcIMS before it, the newest ArcGIS Server is a revolutionary way of serving your ArcMAP documents. The platform supports many capabilities, including the publication of 'tasks' such as geocoding, attribute queries, default and custom geoprocessing, and more. If you can do it in ArcMAP, you can publish it in ArcGIS Server... Click on the graphic below to see a live demo.