Note 2010/06/09: Since I wrote this post, our client has sold her site to Morningstar, which has replaced the subscription area we developed with their own, Windows-based subscription service.

Our latest work involves development of a subscription system using WordPress on the popular financial blog, Footnoted.org. The requirements of the system were as follows:

1. A subscriber registration and payment processing interface
2. System tracking of subscription expiration dates
3. Download management allowing the administrator to easily upload files as well as restricting file downloads to paying subscribers only
4. An email notification sent to paying subscribers when a new publication is available

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