If you have a look at this blog, http://gedalovitch.blogspot.com/ you will find details of an image swap called:
Ruth's pay it forward image swap.
The idea is to email your interest in taking part - be quick though, there are only 20 places - and if successful, Ruth will email you her address so that you can participate. You have to stamp at least 10 images, send them in and you will receive 10 back. This will run 'til February 14.
Just off to stamp mine and get them in the post.