http://www.addshoppers.com/facebook-want-own-button/
First of these I have seen. addshoppers seems to be a more ecommerce orientated add-this type of service.
Interesting that, I am just looking into how to put a link off the checkout page to say "I just bought this from ......." Seems there is not off the peg code to throw onto a page to do that, this is as close as I have got so far.
Thanks Rooftop.
Just digging deeper, and I just realised.
By the looks of these they have to go on publicly accessible product pages, and an after checkout page isn't a publicly accessible product page. So still not quite there.
Anyone had any experience of this? Jack Wills has it apparently.