I've got a 'proof-of-concept' app which I'd like a few people to test.

It will require a browser supporting HTML5 preferably on a device with GPS, a GPRS connection and orientation sensors and a desktop/laptop for some bits.

Home page at : trapper.azurewebsites.net.
If you are interested then pls drop me a line and I'll PM you login details.

The user interface is cr*p and the javascript is spaghetti but.....

FWIW it's hosted on MS Azure using ASP.NET (a mix of MVC, WebApi and SignalR with Google Maps)
JavaScript using jQuery & angular, offline manifests and local storage
Database is MongoDB on an Amazon server.