I have just posted what I hope is the final beta release of WordPress Google Form v0.54.  This latest beta release fixes a couple of minor issues, notably the lack of stickiness on the Form Submission Log setting and adds one new feature.  You can now define a CAPTCHA message to appear below the CAPTCHA input box.  These two screen shots show the information on the Plugin Settings page and the result when the form is rendered.  The message is placed in a DIV which has the class “wpgform-captcha-description” so it can be styled as needed.