Jeff I learned this from this forum a while ago and it worked great.

Duplicate the layer
Use Dust & Scratches on the first layer
Erase the scratches from the second layer (the clean photo will show from the bottom).

Hope this helps,
Liya.

Jeff K. wrote:
> I find when I scan a picture into Photoshop or Elements, there is
> lots of dust, can anybody suggest an easy way of cleaning the
> picture up. I tried the polaroid program but I found that it
> blurred the picture a bit too much.