The TopoZone -
http://www.topozone.com A great site for viewing USGS topographic maps
on the Web! It has a good search engine for locating places.
Maps can be displayed at four different scale and at three different screen
sizes. Once the map is displayed, you can save the URL to send to
others so the same map area can be viewed.
Idaho Department of Lands Dynamic Data Server -
http://gis.idl.state.id.us/GIShtm/static/GisProgram.htm A great place for the downloading of DRG's
without collars, DOQQ in SID compressed format, Level II DEM, and a variety
of GIS data themes by quadrangle. Zoom into a 1 degree block then pick
the quad to download the selected data type for.