I'm so glad I found these forums! I thought I'd never be able to get an update to iChat! I love it and so do the rest of the staff on my server. We have used it for the last two years, since the first day we opened up our server. Surprisingly, it has been working quite well and haven't had any real troubles. That is, until the latest update of PermissionsEx. In the latest update of the plugin, they began adding UUID support to prepare for the username changes coming soon, and because of that, it seems iChat has broken. I'm guessing PEX is now using UUIDs to send information of a player's rank instead of their username. I am going to be contacting the makers of PEX as well to see if they are able to make their plugin use UUIDs, but send rank info with usernames so many plugins, not just iChat, don't break. If they are unable to do so, are you able to work on fixing iChat? iChat is the unsung hero of our server, and has been one heck of a fighter, never breaking from update to update, even though I expected it to. I also wish it was on the Bukkit plugin repository, but that's a different story!
Either way, thanks for the great work you've put into iChat!