I would like to display additional information in /dotlrn/admin/users. Should I just fork in the current installation or is this of general enough interest that I write a callback hook so other applications could display their information there as well?
Alternatively you could provide a parameter in the dotlrn package saying which template you are going to use for displaying the admin information about a user.
But if there is no interest in a more general solution, I will just fork, much easier to do.