John,
You can't control the text that is displayed 'per-action'. The action is always for an 'object', which is your page. The page itself has Open Graph data inserted into it, by JFBConnect, that are things like the title, description, and image. That data is what's used by Facebook to show the object that was acted upon. That data is 'static' to the page, and not able to be altered for specific events.
I hope that explains, but if not, let me know. It can all be a little confusing, we know
Thanks,
Alex