If you are logged into home.inklingmarkets.com, you can go to the settings link in the top left. There you will find a "Connect to Facebook" button. Clicking that will do it's magic. After that whenever you trade you'll see an option to publish to Facebook if you want. A popup of what you can publish to Facebook than shows up and you can choose if you want to publish a little one liner about your trade or more details about the market in general.
I hope you like it, it's been a lot of fun to use so far. And we plan on adding more to it: to let people publish the new markets they create, comments they make, etc. Please let us know how it works out for you.
Here's an example of some trades I made, that shows up on my Wall right now.