RePEc (Research Papers in Economics) now has now indexed one million documents.
Here's an excerpt from the announcement:
RePEc has reached over the last week-end a historic mark: one million works in Economics and neighboring sciences are now indexed, of which 87.5% are available for download. The bibliographic database is comprised by 59.2% of journal articles, 38.5% of working papers, 1.3% of book chapters, 0.8% of books, and 0.2% of software components. All this material has been indexed by volunteers maintaining close to 1300 archives.