For all quality content creators: we managed to make a seamless integration with PayPal Digital Goods and it is available now for you to use smartly on your own content: http://wordpress.org/extend/plugins/paypal-digital-goods-monetization-powered-by-cleeng/
To help you properly monetize your content, we created some "How to monetize" stories, including one dedicated to PayPal. It contains some practical advice about how best to monetize your content.
With the above plugin your visitors can pay with a single click. So far we see an incredible conversion of 4%! (Compare to subscription figures often far below 1%).
So good luck, and let us know if you have any feedback!