Message Notification on File Upload

On any non admin user uploading a file (using the file browser plugin) I want a specified user to be msged that this action has been done. Anybody got any idea the simplest way to do this?

Additionally, and I might be having two bites of the cherry with this, I want the user to always upload with the access level of private so that only an administrator can see it. I can obviously default it to private but either want it to only have private as an option or don't display the drop down at all. I've looked through the access roles posts on this and am no clearer. Have to specifically modify the code for the plugin in question but it seems a tricky one.

Thx in advance for any help