Wufoo strives to be the easiest form builder on the web which you can use to build contact forms, surveys, collect data, registrations and much more.
Wufoo is also easy to add to google sites and integrates with any design quickly and easily. Check out the gethemes contact form.
Check out the video tutorial on how to sign up, create and embed a form
Video credit: Brad Crawford http://www.iowawebsiteguide.com