The document describes a proposed discovery tool called IDS Search that would allow library patrons to simultaneously search the collections of libraries in the Information Delivery Services (IDS) consortium. IDS Search would provide a well-designed interface to search library holdings via the OCLC WorldCat API and integrate additional data sources like Google Books. It would also allow searching at the local, consortial, and worldwide level. A proof of concept was developed by a technical and usability group. IDS and OLIS are now exploring hosting options to make a standalone, centrally hosted version of IDS Search available to all member libraries by January 2010.