I'd like to create a related list that is similar to a Case Team for a custom object that I've built.  I then want to create a workflow to send emails to the users on the "case team" list.  I'd like this to work just like the Cases object, but unfortunately Case Teams aren't available on anything other than cases (hence the word "case").

Has anyone come up with a solution to create an email for a list of users without creating individual email fields or hard coding the emails in a workflow?