The battle for pre-eminence between search engines seems to have reached a point where a few systems and techniques dominate the market. As more careful evaluations have been carried out, our level of understanding of which techniques work for the Web environment has increased significantly. Does this mean that researchers should declare victory and move on to other areas? In fact, substantial opportunities for improving the performance of Web search still exist, and research in this field continues to expand rather than shrink. Areas such as question answering, the Semantic Web, the Hidden Web, cross-lingual search, personalized search, and peer-to-peer search are generating considerable interest. This talk will describe some of this research and discuss its potential.
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