you already pimped this in someone elses thread, die!
Looks good, but that same repeating wood texture should be worked on like I've done here using a model (omg teh hypocrasy!)
http://www.jobsmaps.com/maps/screenshots/theonlywayisup/theonlywayisup03.jpgI don't know what the r_speeds are like, but the above would probably reduce them enough to consider 'fleshing out' the rock walls, they're a little flat at the moment with a giant horizontal seam running around them!
Make the player 'feel' like they are in that room more, don't bother with any echo crap as it invariably never works but a basic haze or some skylights could really add the area.
I know this is a bit overkill for critisism, I'm just throwing some ideas up!