That would be the admin himself - Theymos.
But don't expect any serious changes to be made in the current forum software. Unless if it's something like a critical security flaw.
This is what he said some time back. I believe he is reluctant to make some changes or feature because it would mean also altering the new forum software that is being tested.
- I am the only bitcointalk.org sysadmin and on-demand programmer, and I'm used to the current software. Furthermore, I need to frequently make changes to the current software, but each change I make might require alterations to Epochtalk, which is problematic.
No serious changes needed, just set the search field outside of the forum content folder and then set the search up for the database tables he'd like us to use.