One website that is truly unique is Planet Feedback. Here you can write a letter of complaint, suggestion, or compliment to the business of your choice and Planet Feedback will help make sure that your letter gets in front of a real person that will (hopefully) address your issues.
Part of Planet Feedback's mission statement reads:
* We will connect individuals to each other to increase their influence.
* We will raise the stakes for companies to respond to their customers.
* We will innovate relentlessly to use the Internet as it expands.
I used Planet Feedback a couple of years ago when Paypal placed a hold on my account. Each time I tried to contact them, I got an email that my account was under review. When I wrote a letter through planet feedback, I received a personalized response to my problem in less than 3 days!
Most of the letters written are available for public viewing, which means that you can read everything from Suzanne Somers cheating consumers to Applebees going above and beyond your average customer service.