This system is sponsored by the University of Virginia's Social Sciences Data Center and Gis Lab. Its very easy to use interface is a true advance. It has a very extensive collection of employment and earnings variables from 1969 to 1992 for (i) U.S. regions, (ii) U.S. states and counties, and (iii) U.S. MSAs. In sum, most any regional economist will find it quite useful.
http://ptolemy.gis.virginia.edu:1080/reis1.html
Bill Goffe <bgoffe@whale.st.usm.edu>