Hi,
This falls well within my skill set. I've built Windows Phone code that connects to remote services using REST and SOAP before (there are complications in doing this on Windows Phone, as you have to cater for an async-only method of calling services - I have experience of this) and I have C# code that I can bundle in which will parse JSON responses.
Ideally if you could share a little more info on the APIs involved (are they hosted on the internet right now, can I see the WSDL etc?) and the purpose of the application, so I understand the scope of the GUI work required, that would be great.
On completion of the project I'll be happy to hand over all source code, which will be C#, fully compliant with Microsofts style and design guidelines, Stylecopped and fully commented.
If you have any queries or would like to discuss further, let me know.
Regards
Chris
PulseLab Ltd (UK)