I have been designing (and redesigning) Success.bz (formally Success.com) since 1997. All the designing, coding, and scripting was, and is, done by me.
The original website was hosted using FileMaker Pro databases and Lasso. The site quickly grew beyond the capabilities of FMP, so we switched the site to PHP and MySQL (which are still being used today).
The site has grown in scale over the years, and now possesses an extensive back-end ("admin") CMS area, including: order processing, accounting, sales, customer service, newsletters, products, author royalties, inventory, and offer mailings.
The site also contains LifeOrganizer, an online GTD application I designed specially for Success.bz.