The Search Appliance from Google can search up to 10 million documents using a single box. It also provides a personalized search experience for end users. Optimizing search technology for business uses, the search appliance offers universal search across a slew of sources, such as, intranets, databases, applications, and content management services. Among the many new features of Google Appliance, you have Personalized Search, which allows administrators to adjust search results for different user groups based on department; alerts, where employees can subscribe to email alerts for topics of their interest; and Advanced Reporting where you can view and export daily and hourly result sets, top queries, ete.
Recently Google announced Search