yeah, its almost all css-based. the submit button is a form image, that is the entire right side of the bubble thing and the interior image. the text box is a text box with no borders inside a div with a background of the left side of the bubble.

one of your more standard css tricks.

It's all there in http://nydus-media.com/ts/css/base.css

It should be noted that I took the lazy man's approach and used <input type="image"/> which means you get those superfluous x and y GET params.