Hi Robert,

Right now facts like how many leads or conversions a page has gathered are private to your account so there’s no direct way of showing that information to your visitors on the landing page or form confirmation dialog.

One thing that springs to mind is that you could use a dynamic hit counter image (remember those?) in a custom HTML widget. If you placed it on only one of your form confirmation dialogs then it would effectively count how many people have completed that form to date.

http://hit-counter.info/

http://www.simplehitcounter.com/