From the MSE weekly email:
http://samsungsharegreatmoments.touchnote.com/
Free Postcard
You can send a free postcard anywhere you want in the world! Upload your image, or use one of theirs [ I've been using the Olympic ones for my Postcrossing.com exchange postcards.]
There's no limit to the number of postcards you can send so take advantage while it's free. The price goes back up to £1.49 on Sat 1 Sep 2012.
Touchnote says it's happy for people to use unlimited goes provided it's genuinely to send postcards to friends and family. So please don’t abuse it, it’s a brilliant freebie and it'd be a shame if it were withdrawn.