Just to get back to this with more info since you seem pretty excited to get going, if you want to create a button that specifically lets the user post to their wall, you can follow the information in the developer guide below:
www.sourcecoast.com/jfbconnect/docs/deve.../facebook-wall-posts
That functionality does a server side post to the user's wall with whatever information you want (title, description, image, etc). The user must have already granted your application the publish_stream permission though, which means they should have already logged in.
Finally, one 'hidden' feature in JFBConnect that hasn't been tested thoroughly yet (and why it's not publicized) is a Javascript call to present a popup for the user to post content to their wall. The user does *not* need to be logged into your site or have granted you any permission beforehand. The call is in the /components/com_jfbconnect/includes/jfbconnect.js file and it's functional definition is:
feedPost:function (title, caption, description, url, picture)
So, you *should* be able to create a button that calls the Javascript, like:
<a href="#" onclick="jfbc.social.feedPost('Jeremy's Page', 'Come look at what I found!', 'This great page features dynamically generated images you might like', 'http://yoursite.com', 'http://yoursite.com/link-to-image.jpg');">Click me to share!</a>
Again, very untested, but may get you started!
Let us know how it goes, and good luck with the options above,
Alex