How to pass feedback and suggestions to Dell?

How can we pass product or other feedback and suggestions to Dell?

I bought a Studio XPS in February, and I did receive an e-mail from dell requesting feedback on the product. Unfortunately the link did not work, and it was a "no reply" e-mail. I have searched around the Dell support pages and cant see anyway to give feedback other than specific order-related issues.

I would like to give some customer feedbnack on the technical support sites also.