The California Digital Library was awarded a National Science Foundation grant in 2003 to build on and enhance the National Science Digital Library (NSDL). The work has been completed

Update: (The metasearch infrastructure project is no longer active. For Metasearch Info and Metasearch NSDL See:
http://www.cdlib.org/services/d2d/metasearch/index.html

Heather Christenson managed the project, which involved a number of CDL staff.