Is there a method to see a listing of which users are currently connected to the system? It would be nice if there was a display in the administration interface that either flagged the users as active, or just listed the accounts that were currently connected (and to which services (SMTP, IMAP, WebMail, etc), would be nice feature).

If this type of function already exists, and I'm missing it, please let me know.

Thank you,
Jason Ziemba