From the announcement,
The research center will serve as Ask Jeeves' European hub for search technology research and development, working directly with the company's U.S.-based research centers in Campbell, Calif. and Piscataway, N.J...The company recently launched two European Web search sites, Ask Espana and Ask Deutschland, with additional European launches planned later this year...Lead by Antonio Gulli, an expert in search engine technology and the creator of Italy's first search engine, Arianna, the Ask Jeeves European research center will support all of Ask Jeeves search sites, including the flagship Ask.com.
In April 2005, we blogged a quick entry about a paper Mr. Gulli was presenting at WWW 2005 Conference titled: A Personalized Search Engine based on Web-snippet Hierarchical Clustering (PDF).
Gulli's home page is not only home to a treasure chest of interesting reading, slide presentations, tutorials, etc. but also to several live web demos including:
+ SnakeT (Alpha)
"Hierarchical Clustering Engine for Book, News, Blogs and Web-Snippets." This is the search tool described in the paper linked above.
Here are a few other papers that Gulli co-athored for WWW 2005.