How does pricing work?  I want to distribute our own application to non-salesforce customers.  I understand there is a 15/month/user embedded license cost but if I also want to create a force.com site how does that work?  For example, if the new organization that I sell the solution to has 10 admin users but the force.com site that we create has 1,000 registered users, how much does that cost. 

Thanks.

-Ben