Luke Parker suggests a great way to drive website traffic through testimonials. If you're not only responsible for your company's customer reference program but also for website traffic, you will love this guerrilla marketing tactic.
The idea is not to use testimonials from your customers but testimonials you have written yourself, attributed to yourself, about other products and services in your industry that you don't compete with. By including your company name and website in the attribution of the quote, you can drive traffic back to your site. Watch Luke's video on the topic for the full story. Even though the video's music is very cheesy, I just love the way his marketing brain works.