OK, I confused myself on this one. In the who's online script it calls the w3t_online contents, deletes anyone who's TIME is older than 600 seconds (ie 10 minutes), and displays the rest.
Logic states I can change 600 to 3600, and it will NOW keep everyone who has been at the site for the last hour.
Well I added a minute or two...but it is not keeping the past hour's viewers. Any idea why, or is this variable elsewhere also?