I have now submitted a new application to marketplace for certification, Gasmackar, which helps you find natural gas stations in Sweden. It shows the price and address, and allows you to easily navigate there using Bing Maps. It also features a live tile displaying the current average price for natural gas in Sweden. All information is from http://www.gasbilen.se, a huge thanks to them for supplying the data. Below are some screenshots:
The application will soon be available in Windows Phone Marketplace. I will update with a link when it is available!