For those of you using the excellent Concrete5 CMS framework, here is an add-on for handling subscriptions; it's called Simple Subscriptions. In summary, and I quote: "Want to require a recurring payment to access certain parts of your
website? This is the easiest way to get from a standard Concrete5
website to a subscription service! Great for membership sites too."
http://www.concrete5.org/marketplace/addons/simple-subscriptions/
