From an OCLC Announcement:
The ArchiveGrid Blog is part of OCLC Research’s beta ArchiveGrid discovery system, now freely available and providing access to primary source materials held in archives throughout the world. ArchiveGrid helps researchers contact archives to request information, arrange a visit, and order copies—all from one simple, intuitive search. The OCLC Research version of ArchiveGrid will eventually replace the existing ArchiveGrid subscription service.
Anyone seeking historical collections can use ArchiveGrid’s powerful search engine and user-friendly interface to retrieve results that include the title of the collection, holding institution, brief description and a link to an extended description. And now anyone can learn more about ArchiveGrid or archives in general with the ArchiveGrid Blog.
Learn More About Archive Grid
Use the ArchiveGrid Discovery Interface