I've just posted the ASP.NET Dynamic Data website I usually build when I do a Dynamic Data demo. You can download the source for it here. The demo site illustrates a few features of ASP.NET Dynamic Data:

• Scaffolding of my Houses database using Linq to Sql as the model
• ScaffoldAllTables is set to true but I prevent scaffolding of the HomeTypes table with the [ScaffoldTable] attribute
• Customisation of the model including validation, UI, business rule etc
• See ModelCustomisations.cs
• Customisation of Pages
• [Global] All Edit pages have been customised (not much - just to show the principle)
• [Individual] The List view of the Homes table has been customised
• Customisation of Fields
• [Global] All boolean fields have been customised with custom icons
• [Individual] The ImageUrl, Lat and Lon fields have all been customised

Please read the notes on the download page as they explain the requirements (Ajax Control Toolkit and a suitable DB - a script is included if you want to recreate my DB).