As noted in our weblog two weeks ago, Factiva has been readying a new single-box search interface for its premium content, which was announced today billed as iWorker, a technology that maps keyword queries into Factiva's multi-tier taxonomy to further refine results. Translation: our back end technology works rather differently than typical search engines, which is good in some ways but also indicative of the difficulties of mixing content from unstructured sources from the culled and categorized sources found in a typical premium aggregator's database. Along with iWorker comes a new Factiva-specific search box widget that can be imbedded in one's browser toolbar, similar to tools developed by Google and AtHoc. Good stuff, and again a step in the right direction, but it's indicative of how far behind most premium aggregators are these days in providing content value. Taxonomies are great, but they're not going to justify the cost of a premium database of 9,000 sources in the long run when public search engines are learning how to integrate premium sources into their own algorithms. Aggregators must accept that the ultimate premium content solution will always go beyond the content that they can license to their users. A painful fact, but one that will be coming home to roost soon enough anyway.