I think Pledge furniture polish spray is a great product. I use it on car / truck interiors instead of arnor-all and it doesn't seem to attract dirt like the other does. I've never tried the dryer sheet but sounds like a good Idea too.
Try wiping them down with a dryer sheet - it helps to repel the dust so it doesn't build up so fast.
I have also read that the cleaner Simple Green is supposed to help repel dust.