I recently came across Robert Plank’s web site and noticed that he is doing some cool stuff with his web site, using PHP and Javascript. The one that I liked the most is his use of JV Plus, which allows you to easily have an affiliate program promoting your blog and still be able to allow your affiliates to make money with your products.
I recommend you to visit Robert’s web site and enjoy the insightful posts about various aspects of Internet marketing and PHP/Javascript programming. He has a large number of utilities listed in the right sidebar which may help you run your website, blogs and business with much more converting power than you may be having now.