Microsoft appear to be getting tough with sites that have been leaking Windows 8 features over the last couple of weeks.
Sites such as winreview.ru, PCPortal.org.ru and wst-place.****.com have all closed, probably as a result of legal threats. Winreview.ru posted on twitter that:
winrevuew.ru is not exists [sic] anymore because it is pointless project for me now. not affiliated with MS requests
Source: http://windows8news.com/2011/04/05/windows-8-leak-sites-closed/