Well it depends.. everyone has a different interpretation of what an expert is.
My experts panel consists of various advisors with different knowledge in various fields.
I want to see how they might fair aganst some good php questions. If they don't do too well then i may try to get one or more new experts in php before i do my competition.
I am just trying to build up my forums so that when people post there is an expert in every field that might be able to deal with that post.
Once i have a good panel in place then i am hoping my competition will produce some new members and start to fill the forum up with decent posts.
Knowone likes to join an empty forum... or inactive forum, i am trying to encourage people to sign up and use the forums.
I get a good amount of traffic, i have some good search positions but the sign ups are slow.
This is the best route for me to handle that problem.