Hmmmmm..
Depends what you want
You could run something from the cron every 10 mins or so
0,10,20,30,40,50 **** date;w|wc -l >>/tmp/file
which would give you :
Fri Feb 13 15:21:08 GMT 2004
13
that is - that time and number of users logged on
HTH
Dickie Bird ((:-)))