Hey there,
I'm Patrick, co-founder of CityPulse, a platform for professionals and tech enthusiasts to discover and attend over 500k events in 200 cities.
We have used Xamarin.Forms for our implementation and have been very happy with the results, so I'm keen to share and give back the Xamarin.Forms community.
Public beta should be available next week across iOS, Android and Windows Phone so I'd love to get some insight from this community. You are, after all, both great for tech feedback and our target market 
Although I don't claim to be Xamarin.Forms guru by any means, I'd be very open to answer any questions about 'How do you do X' once the beta launches and people can use the apps. Anything that might be useful I'll blog about too - quite a few of our blocks and issues have been solved by browsing these forums or using snippets/frameworks from the forms community so I'm very keen to give something back if I can.
App signups are at http://app.citypulse.io.
I've also attached a picture of CityPulse running on an iPhone 5S, Nokia630 & HTCOne.
Any questions please ask here, or you can send me a mail at patrick@citypulse.io.
