Malibu was an eLib project working on Hybrid Libraries - these contain physical books etc as well as digitalcollections. The project developed and implement prototype hybrid libraries in each of the three major partner institutions and made a new search engine called GIGA.
One of the challenges is to link up library databases (via Z39.50) with archives running different databases, plus external services such as BIDS so that queries pass to all data sources. GIGA passes searches to sites like libraries which have a structured interface as well as to database-run web sites and semi-structured sites. It collates the results and unifies their appearance.