We need to build an administration portal website to support our client/server application. Since we\'re a .Net shop the obvious traditional way would be to do that in ASP.Net.
Depends on your goals. If administration portal is part of application and will only be used from computers where your application is installed, there are plenty of advantages of going fully Silverlight - or even WPF.
But if you can see a scenario where it will be used either from random PC or by random person, fully functional HTML/Javascript version is absolutely necessary.
Some reasons are: