ArcGIS Layer for US Imagery
Web service layer of US aerial imagery for ArcGIS 9.2
ESRI has created a layer (.lyr) file for use in ArcGIS 9.2 that will add USDA NAIP 2005 aerial imagery to your view. The imagery covers the continental US. To download the layer, visit ftp.gis.iastate.edu and navigate to \ISUGIS\Utilities\ArcGIS. Get the *.lyr file and add it to your ArcMap session.
You can also click here for the same location.