We have established a web site for exchanging USGS Digital Raster Graphic CD-ROMs.  USGS DRG CD-ROMs are not copyrighed, so there are no restrictions on copying and/or exchanging them.

We trade DRG CDs (one-degree coverage format) on a one-for-one basis, for the entire United States.

The web site URL is:
http://www.pipeline.com/~jcsi-maps/drgs/

Thank you,
Mike Jenne