We’re glad to announce the third version of WordPress Sphinx Search plugin.
WordPress Sphinx Search plugin allows to use Sphinx Search Server power to enable ultra-fast and feature-rich search on WordPress-based websites. It is especially useful when your WordPress site becomes very large.
The new version enables a range of new tools that improve search quality and can help you increase your site’s rankings in search engines like Google and Bing.
With this version search results are more relevant, you can perform searches in posts, pages and comments using flexible search syntax sorting the results by freshness and relevance. This plugin comes with sidebar widgets to display the most recent searches, top searches and related searches.
Official plugin page.