What about that new member from a few months back who does graphics work? Otherwise, I recommend Jason Isley to people:
http://www.cavemanartwork.com/
I've had him do some work before and he does an outstanding job, not only with creativity behind the artwork but with building a high quality electronic image. Whomever you have do your artwork, make sure that they know what the hell they're doing when building the artwork. There is a difference between "high resolution" images and quality vectorized images. I have .eps logos of a number of high dollar companies that one would think have good artwork; wrong.