Samuel Dean has in his blog, Web Worker Daily, a post titled Need a Better Search Engine? Roll Your Own. He’s writing about a new web-site, Rollyo. Rollyo allows you to roll your own search engine, which they call a searchroll. The site defines a searchroll as:
“… a collection of the sites you trust and find useful. It’s a personal search engine you create to provide relevant results from a hand selected list of reliable sites.”
Dean’s blog post shares a little bit of his experience with Rollyo.
Rollyo lacks the ability to fill out search forms and search sources live so it’s not a federated search engine but it might be useful as a tool for aggregating some crawled and indexed content and using it as a source for a federated search engine.