Several of the major academic search engines and standards bodies are working together to improve literature searches and academic repositories. The following quote is not terribly readable unless you already know most of the acronyms:

CrossRef (http://www.crossref.org), the reference-linking network of the Publishers International Linking Association (PILA), has officially launched a free DOI look-up feature called Simple-Text Query (http://www.crossref.org/freeTextQuery). Users can enter whole bibliographies with citations in almost any bibliographic format and receive back the matching Digital Object Identifiers (DOIs) for these references to insert into their final bibliographies.

…CrossRef actively encourages DSpace repositories to assign DOIs to original, nonduplicative works and register their DOIs with CrossRef, rather than just relying on registration with CNRI….

CrossRef also supports OpenURL links, using the OpenURL syntax in its own system and making all its publishers “OpenURL compliant” for its library participants. It also works with services such as Google Scholar, Microsoft’s Windows Live Academic Search, and Elsevier’s Scirus to connect content to the leading Web search engines.

Linking Up Bibliographies: DOI Harvesting Tool Launched by CrossRef.