Getting optimized images
If your application need to display an image hosted at yfrog.com you can get version of the image, optimized for your device. You need to add ":" and then device type to your URL.
For example:
For yfrog URL
http://yfrog.com/0fh5rvw4j
Direct image URL, optimized for iPhone would be:
http://yfrog.com/0fh5rvw4j:iphone
Currently only "iPhone" device type is supported, which will return the image, scaled to fit 480x480 box.