The link is just above the message list, just below the iBox/header.
Clicking Manage takes you into the iHub Moderator's system (aka Chairman of the Board). Within it, you can do numerous things to help make sure your board is top notch.
1. Remove/restore posts against the TOU 2. Manage an e-mail list 3. Add assistants to help you 4. Create surveys 5. Edit the iBox/Board header
This is the cornerstone of iHub. Please help out by Moderating any boards you are in charge of!