i think what hes asking is how do they track who is logged into the site or not. ie. currently viewing this forum is 57 guests and 47 users : list of user names. Similar to how CF shows a list of active users.
I saw a company does something similar to this for free, all it specifies is active users, not members, but it was free and only like one line of code that you stick into the html. I cant remmeber the site, but i'll see if i have it stored soemthwere.
EDIT: Forgot to say that tracking active members is easy b/c they log in when they are in the site, i am sure i would be able to write a script that can track that. I wouldnt really know how to track all users, including non-memebers.
