Google New Search- Can Block Websites

Google has updated its search engine to add a new feature using which users can block websites they don’t like.Now when you click a result and then return to Google, you’ll find a new link next to “Cached” that reads “Block all example.com results
Once a domain has been blocked, it won’t appear in future results but users will be informed if search results would have contained results that their preferences now mean they have blocked.
The new feature is rolling out initially on google.com in English for people using Chrome 9+, IE8+ and Firefox 3.5+.