There’s no magic wand that will do the work for you, but we have put together a great package to help you get started. It’s available at http://windowsphone.interoperabilitybridges.com/.

The package consists of:

• a NEW iPhone/iOS to Windows Phone 7 API mapping tool (see details below)
• a 90+ pages “Windows Phone 7 Guide for iPhone Application Developers” white paper, organized in 8 chapters, and growing
• a series of “developer stories”, in which developers share on video their experience porting iPhone applications to Windows Phone and explain why and how they did it.

...

And before you ask, yes we are planning to provide similar guidance and tools for Android.

Stay tuned!

Jean-Christophe Cimetiere, Sr. Technical Evangelist – Interoperability
@jccim - blogs.msdn.com/interoperability

Taken from <http://windowsteamblog.com/windows_phone/b/wpdev/archive/2011/04/29/leveraging-your-iphone-development-expertise-to-build-windows-phone-7-applications.aspx>