A few nice website traffic generator images I found:
Smart Social smartsocial.yolasite.com is a Great Guide to creating FREE and EFFective SEO through Social Network Sites. Use the popularity of the Major Social networks to boost traffic to your website, business, or other activities. Smart Social makes it easy to connect, communicate, and spread your message to the globe.
Google Eye by Andrej Boleslavsky
Datasculpture visualizing statistics about traffic on imal.org website during one year