Andy Brice mentioned on his blog about how to get website/product feedback from within every page of your website using a free service called Kampyle.
About 2 weeks back, we added Kampyle to our website. Since then we have received some useful feedback about the product and website which we may not have received otherwise.
Kampyle adds a button to every page of your website so that the user can submit feedback effortlessly. You just have to add their script on the footer of your page.
Read more about it on Andy’s Blog.