I worked on various campaigns for Days Out Guide in the summer of 2011 including Name The Gnomes, Name The Gnomes Votes & a Gnome Spotting application. All of these applications were used to promote the Days Out Guide brand on Facebook.
I mainly used JQuery running ajax calls to our servers that would get and post data for the applications.
The Gnome Spotting application involved using the popular JQuery plugin AjaxFileUpload that would take a users image selection and post it to the server inside an iframe that runs in the background of the browser. This would then allow images to be posted to the server, resized and processed to their folders without the need for the page to refresh.