Merging and maintaining bibliographic databases

Marcive is a company that offers "bibliographic services" such as deduplication of records after multiple libraries place their records into a shared catalog, reclassification from Dewey Decimal to Library of Congress classification, enrichment of brief records, etc. Their database cleanup brochure makes fascinating reading (well, if you've been spending way to much time thinking about pooling disparate databases).

There is a definite parallel between maintaining and merging library catalogs, and what the data commons aims to do. Wish we had an equivalent of the Library of Congress...