I have really enjoyed working with Xamarin Forms and all the work that's going in to make it better.
I wanted to help out by open sourcing some of my work :
https://github.com/paulpatarinski/ShouldIWashMyCar
So far the Android version is near completion, I will be working on spinning up the Win Phone next.
In the repo you will fine examples of some of the following :
•Getting current GPS location using Xamarin Forms Labs - https://github.com/XForms/Xamarin-Forms-Labs
•Xamarin Forms Maps
•HttpClient extensions to help consume Web Services using System.Net.Http
•Consuming Google Places web api - https://developers.google.com/places/
•Consuming Open Weather web api - http://openweathermap.org/API
Cheers
Enjoy