http://zrba.awardspace.com/bagpic.php
I developed this system so that I could transfer items to other people without both of us needing to be online at the same time, but I figured I'd make it usable by everyone. How it works is that you bury a bag, take a screenshot and mark where you buried the bag (and include a map with the bag's location marked as well in the image) and upload it to the ZRBA. The image is then encrypted (so that nobody, including me, can view it without the code) and you get a code which can be used to decrypt the image. You give the code to the person you want to have dig up the bag, they enter it on the page, and they get the image telling them where to dig up the bag. You can also include a message (which is also encrypted) along with the image.