We are developing a new site that will be used by both Customers and Partners. For now, the functionality is the same and both users will be seeing the exact same pages. However, because their license types are different, one uses a site associated with customer portal and the other uses a site associated with the partner portal.

Is there no way to consolidate these into a single login page such that if I can detect which users are partners, I could then direct their login to go through the partner site? We really don't want to have two separate login URL's...