Illinois Researcher Information Service (IRIS)
This service is operated by the library of the University of
Illinois at Urbana-Champaign. It maintains a database of close to
8,000 funding opportunities, and is updated daily. A search for
"economic" yielded some 900 "hits," but not all of them seemed to be
of interest to academic economists. Your institution must be a
subscriber to use this database. There are more than 200
institutional members, and a link to the list is in on the main
page.
http://www.library.uiuc.edu/iris/