Amazon CloudSearch
http://aws.amazon.com/cloudsearch/

Amazon CloudSearch is a fully-managed search service in the cloud that allows customers to easily integrate fast and highly scalable search functionality into their applications. With a few clicks in the AWS Management Console, developers simply create a search domain, upload the data they want to make searchable to Amazon CloudSearch, and the service then automatically provisions the technology resources required and deploys a highly tuned search index. Amazon CloudSearch seamlessly scales as the amount of searchable data increases or as the query rate changes, and developers can change search parameters, fine tune search relevance, and apply new settings at any time without having to upload the data again. Amazon CloudSearch enables customers to offload the administrative burden of operating and scaling a search platform. Customers don’t have to worry about hardware provisioning, data partitioning, or software patches. Amazon CloudSearch offers low, pay-as-you-go pricing with no up-front expenses or long-term commitments. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This will be added to Grid, Distributed and Cloud Computing Resources Subject Tracer™.