To learn more about caffeine and caffeine addiction, visit: <a href="http://OverCaffeinated.org" title="http://OverCaffeinated.org" target="_blank">http://OverCaffeinated.org</a> (<a href="http://www.overcaffeinated.org/" title="http://www.overcaffeinated.org/" target="_blank">http://www.overcaffeinated.org/</a>). Zak Rowe is a freelance writer.