I have said it before and I will say it again. In fact, I can’t say it enough. Every Mobile developer should build apps for ALL mobile platforms. It just makes sense. You have more opportunity to make money. You could even build the cool app that bridges the gap between Android, iPhone, Windows Phone 7 and Blackberry. Now I know the first thing that any iPhone developer is going to say is that they do not want to take the time to port their app over. The also may think that that it is too difficult to bring the app over. Fortunately, there is a site taking time to help you.
On the site jesseliberty.com Jesse is going to create tutorials to help you through the process. Jesse Liberty a Senior Community Program Manager for Microsoft is focused on Silverlight and Windows Phone 7. On his site he takes some time to talk about the Performance and specs. He also takes some time to layout which codebase is good for you to use. He Jesse expects to release a tutorial weekly.
{info via wmpoweruser.com}