MtGox and BitInstant are not the only industry members, there are many more.
Can I ask why you want to know specifically?
If I got the situation correctly...
The board has two "industry member" representatives, and two " individual member" representatives. The seats are elected by members from the class that they represent.
...directors are elected by Foundation members. And only a member can be elected. If MtGox or BitInstant did not pay membership fee, then they can't be members and can't be elected. So I'd like to verify it. I have nothing against BitInstant, used their service a lot of times without any problems. But I do
not want to see MtGox involved into anything related to Bitcoin regulation.