Go here... http://www.singlerchiro.com/contact-us/
Try submitting the contact form without filling out any of the fields. Notice how the fields turn colors instead of the typical Gravity Forms default error behavior? This is cool as it's much more streamlined. I accomplished this via CSS (and nothing more) so it would be a pretty easy implementation. However, I think it would be cool if there was an 'option' in Gravity forms to use this kind of error formatting in future releases.