www.cuil.com is new search engine on the web.

"Cuil (pronounced COOL) provides organized and relevant results based on Web page content analysis. The search engine goes beyond today’s search techniques of link analysis and traffic ranking to analyze the context of each page and the concepts behind each query. It then organizes similar search results into groups and sorts them by category."

That's how they explain about their product.

There are four main features,

1. Drilldown
2. Roll-Over Definitions
3. Tabs
4. Navigation suggestion

Read More

Cheers.........!

Found good article about the Regular Expression. Check it here

Cheers............!