Earlier this month Mahesh Hariharan and I presented to the XRM Virtual (http://xrmvirtual.com) user group on connecting mobile applications to Microsoft Dynamics CRM 2013. If you weren’t able to watch it live there is a recording here https://www311.livemeeting.com/cc/usergroups/view?id=3JGDNF
During the talk we discussed how oAuth makes it much easier to connect to CRM from Windows, Windows Phone, iOS, Android and other platforms as long as they can do the oAuth workflow. I showed a library to make it easier to connect from Windows Phone as one of the demos. I’ve just uploaded the source code for that library to github incase it might help others get going.
You can find the library here - https://github.com/davidyack/CRMAuthBroker