While look for more information on Crazy Egg, a great sevice that produces images showing user activity on a web page, I came across an article on Ask the CSS Guy on creating integrated forms.  It explains how to creates a table displaying features associated with different pricing options that when one is selected  a sign up form is displayed.  The page works with javascript turned off as it takes the user to a separate page when this is the case.  However, there may still be some accessibility issues as not all speach browser users disable javascript and they may not be aware of the appearance of the form. The example would also be improved if it did not show the option button once it is selected. Still a very interesting technique and great tutorial.

Creating a table with dynamically highlighted columns like Crazy Egg’s pricing table