hehe this happens to me, all it is is the steering wheel rubber rubbing on the fixed column. Check everything to make sure but this was happening to me and only when its warm out and I it took us a good day to figure out where it was coming from, it's annoying but as long as i turn the music up louder i can't hear it any more, my car is 1999 by the way. good luck!
There are a lot of threads about this problem. I have it, too. It seems to go away in the warmer weather. I have decided to not worry about, too. Out of all the posts I have read about this issue nobody has ever indicated that a serious problem has resulted from the noise. I would like to get a definite answer as to what causes the noise.