Tim,
You should ask me I know. :)
SELECT Users.Username, Users.Email, PortalAlias.HTTPAlias
FROM Portals INNER JOIN
PortalAlias ON Portals.PortalID = PortalAlias.PortalID INNER JOIN
Users ON Portals.AdministratorId = Users.UserID
That will give you the username, e-mail address and portal alias of each of your portal admins.
Cheers,
Champion of the Join and third normal form. :)