Button Issues...

Ben,

When you add a form to the sidebar with a widget or by just using the function call, you have to manually enqueue the Gravity Forms styles and scripts by adding a block of script to your functions.php file.

http://www.gravityhelp.com/documentation/embedding-a-form/

The sidebar form on http://jerrywalker.org/wanna displays correctly because the form styles are being loaded automatically by the form that's in the post body. On the main page, no Gravity Forms styles are being loaded so thats why you see the discrepancy.

Add the script block to enqueue the styles and you'll be good to go.