Form-Mail.com
Ever wanted to add an actual feedback form to your site rather than just having an email address printed on the page? Well now you can, and for free. Form-Mail.com provides users with a mechanism for getting input placed in forms by users delivered straight to your inbox. It works with a remotely hosted server-side-script which shoves the info from the form into and email and sends it to you.
You have to be competent with HTML as you have to be able to create your own forms. You also have to have a link to Form-Mail on your feedback page. But this can be fairly discrete as it is with my feedback form. The final downside is that there are stirct usage limits. You can have a maximum of two forms with 50 submissions between them per month. If you need more than that you better host your own script (like I am testing here).
I have known about and used this site for months but somehow it escaped mention on this blog.