Ive found what I would call a serious oversight in the Users Online module.  I the Latest field displays the username and not the displayname,  which mean that half the clients logon details are now visable.

How can this be modified to display the the displayname

Yes modify the sp (the Last User Registered portion) to look like this:

create procedure dbo.GetOnlineUserStatistics

@PortalID  int

as

-- Anonymous User Count
select count(*)
from  AnonymousUsers
where PortalId = @PortalID

-- Users Online Count
select count(*)
from UsersOnline
where PortalId = @PortalID

-- Last User Registered
SELECT DisplayName,
       UserID
FROM   Users
WHERE  UserID = (select top 1 UserId from UserPortals where PortalID = @PortalID order by UserPortalId desc)

-- Membership Count
select count(*)
from   UserPortals
where PortalId = @PortalID

-- Members in last day
select count(*)
from UserPortals
where PortalId = @PortalID and CreatedDate > DateAdd(d, -1, GetDate())

-- Members day before
select count(*)
from UserPortals
where PortalId = @PortalID and CreatedDate > DateAdd(d, -2, GetDate()) and CreatedDate < DateAdd(d, -1, GetDate())

GO