mine does that too. It's not REALLY coming from the dash, just sounds that way. Only does it sometimes and can't hear it outside the car. I thinkthe engine drowns it out.
I usually hear it in 1st gear, idle-3K then it goes away but comes back when I decelerate.
Mine's been doing it since I got it and 35K later, still no worse or better. :shrug
I wouldn't worry about too much.