Digital BW, The Print

>I get straight black.  Curve adjustment in the Twain package doesn't seem to 
>bring very much of that detail out.

As others have reported similar problems, I usually scan my B&W negatives 
as color positives to get the maximal tonal information and then invert and 
desaturate in Photoshop.  Many have described this method, and it seems to 
work well with my limited scanning expertise.