Great article on Mobile support in .Net. What are you going to do? Should you code for Internet Browsers on Mobile devices? This is a hard thing to do because of all the browsers and idiosyncrasies. What about smart apps? What about silverlight? Does Silverlight work on the iPhone and Nokia? What to do, what to do? How do you handle devices that are intermittently connected?

http://blogs.msdn.com/hegenderfer/archive/2008/12/09/what-s-up-with-asp-net-mobile-controls-ie-mobile-and-silverlight.aspx