Not a long time ago, I created an application project in my image processing code, that hid data and other images inside an image. Something not very unique, in fact anyone with some image processing knowledge can do that.
Anyways Hid.im is a unique service. It converts .TORRENT files into PNG images for you to sneak around anywhere. The files wont be detected by a search engine or anyone else for that matter.
You can upload a Torrent file (less than 250kb) on hid.im or make use of their Firefox extension. Decoding is equally straight forward with the help of this bookmarklet which works on Firefox 3+ and Safari 4. Just give it a shot. The image above is actually a torrent from Office 2010 Beta.