Nokia banner generator
Nokia has released a great tool for us developers, a tool that generates nice looking banners for our apps. Just go to http://snac.nokia.com/2/omt and choose Windows Phone and input your marketplace link and it will pull icons and information from the marketplace!
It generates a lot of different form factors, and they will even host the banner images for you! Below are some of the banners generated for Hitta Bostad: