While I've never been walking on the shore and found the proverbial glass bottle, stoppered and sea-worn; I have been the lucky recipient of a few mailed messages in the bottle. It's funny what the P.O. will sometimes mail through and sometimes return, but it's totally worth it when an experiment pays off.
If you, like me, adore the romance of the message in the bottle, here's a great BBC documentary by Nina Perry about them. If you feel you want to send one yourself, but would like a little help, Margaret at Paper Pastries has you covered. Remember, if you do send a mail experiment and want to share it with us, put it up on the L.W.A. Flickr group!