About Usfoaf-search.net is a project of netEstate - a german company specialized in crawler, search engine and semantic web technology.
You can learn more about us on our german homepage.
One component used in this project - the SparqlCrawlServer - is available on Github.
Other projects of netEstate are:
A site to create and share text classifiers.
An event search engine for events described with the hCalendar microformat.