One other option I have been considering is a manual process using FreshBooks.com. Using the subscription services, I would just have to add the new customers w

One other option I have been considering is a manual process using FreshBooks.com. Using the subscription services, I would just have to add the new customers when they joined and remove them when they canceled. It appears from the documentation that it will send an invoice and automatically charge the customers credit card. From the freshbooks website... Overview Managing subscriptions to FreshBooks centers around creating recurring profiles. The same functionality available in the web application found on the Invoice tab under the Recurring subtab is available through the FreshBooks API. FreshBooks recurring profiles create and send invoices automatically for you so you don’t have to manage them yourself. FreshBooks recurring profiles do some interesting tricks: * Automatically send recurring invoices monthly, yearly, or as little or often as you would like. * Automatically charge your client’s credit card whenever you generate an invoice. * Rack up charges. Add or remove line items from a subscription at any time. * Send invoices by email or through the post.