Lately (most of this calendar year), invites have been sent out to people who make submissions to the site. That doesn't mean it's exclusive to them -- that's just how I seek people out.
If you or someone you know is interested in being featured, send me an email (railus@allakhazam.com) or a PM and I'll send you to the questionnaire. Nominations and self-nominations are welcome. We have featured several nominated and self-nominated people in the past.
It's not "open" or publicized much because I want to avoid overbooking. I don't imagine many people would want to go through the process of filling out the questionnaire and then have to wait 4-6 months for the profile to show up. I try to keep that wait down to ~1-3 weeks.
____________________________
http://everquest.allakhazam.com