Q-go is a Dutch company with an impressive lost of customers …
… Q-go is a fast-growing independent software vendor (ISV) specialising in natural language search (NLS) technology. It wanted to offer its customers an alternative solution to search engines such as Google. By integrating the company’s NLS solution with Microsoft® Office SharePoint® Server 2007 for Search, users pose questions to organisations in their own language and get an immediate answer…
Source and full case study : Microsoft.com