Extending Drupals capacity as a Login Manager

I'm new to Drupal, and though I understand some php, I'm not really a developer. Still, I wonder if this module has greater potential than has been recognized. Briefly, after installing Gigya, a social networking module, I found that session variables are passed from my subsite [A] to the main domain [B]. As [B] has social apps from 'AddThis', it provides a seemless transition from one application to the other, well, at least as far as social networks perspective is concerned. Now, on the other hand, I've installed a user share on [B], so sign-in data can be retrieved from [A]. My problem is that with a social sign-in there is no password to transfer, so the user can't access account functions on [B]. So it became obvious that generating a password and passing it to [B] would empower both the user and my app. What needs to be done is to call this module when a social user creates their account on Drupal. It would be nice to have the option of letting the user change it if desired, but really, in practice it becomes an internal key used to link their email address to an account. Nothing more. However, it might still be advisable to suppress the password box in [B] as a precaution and to clarify the type of sign-in being used. Perhaps this can be done within Drupal's framework already, I'm not knowledgeable enough to say. It seems, though, that a lot of other apps could be empowered to work with drupal if this was ironed out. I would like to know your thoughts. Thanks.