Help needed, Please reply, Thanks!

I think it would be nice if you could have a plugin that would allow users to change their account from a basic account to a Plus Account meaning in the plus account you would be able to see who viewed you, Be able to view someones profile while being invisable and so on, Is this possible. :) Also I'm looking for a ask me plugin like how has the type of plugin I need for the first request is like when you sign up for an account with you get a basic account but they allow you to upgrade to a meetme+ account that allows you to show you who viewed your account and so on.  :)