Good resources to learn mobile adaptation techniques

Question

Hello

I am a web developer that has worked on ASP.NET-based Portal web applications for quite a few years. Recently, my company tasked me with developing a mobile version of our portal product. I have found quite a few resources about developing mobile web applications and have made great progress in my task, but one topic that I have yet to find any good resources on is device adaptation, and specifically adaptation with ASP.NET. I've found some resources on MSDN slightly useful, but haven't seen much in the way of concrete examples. Does anyone know of good sites or books for this topic that include concrete examples? I usually code in C#, but can translate most languages, so it doesn't need to be C#-focused (though it is preferred). Anything at all would be greatly appreciated.

Thanks Frank