I've been searching online for answers surrounding the Customer Portal / Authenticated Website / High Volume Licenses of Salesforce.com. I didn't find much information on licensing or the technologies, except for these links:
Understanding User License Types: http://na14.salesforce.com/help/doc/en/users_understanding_license_types.htm
About Customer Portal User Management: http://eu1.salesforce.com/help/doc/en/customer_portal_manage_users.htm
I'm looking to build a Website on the Force.com platform (App Setup > Develop > Sites) using a custom interface using Visualforce and Apex classes, where users are allowed to login/register and make specific request through the custom UI (read/write records, create tasks and more). This will mainly be used with Custom objects.
What are the most affordable solutions for achieving something similar that will reliably serve ~10-50k customers? What would be the estimated costs? I ask about costs since the pricing for Customer portal licences does not seem to be openly available.