The member directory is a listing of all registered members of Halsoft chat. This includes all member names, whether or not they're the account owner.
Member names that have clickable links have created a home page. A blue button next to the name is a link to that member's profile, and a green button means they're using VP right now. Clicking the green button will let you send them an IM, but only if you're viewing this page while using VP.
Your profile can also be seen by chatters who click the "profile" button on your Identity in VP.
You can view the list different ways by clicking any of the radio buttons above the list. The list is presented alphabetically. Click on the appropriate letter grouping to see those members.
You can update your profile using the link on this page. See also Editing your profile.