Win8China (cache) which is specialized in the rumor around os Microsoft Announces into a source of “insider” that Windows 9 will be released in November 2014, with a beta phase would begin in January 2014.
These statements should be taken with a grain of salt even bigger than usual since the article was removed from.
Windows is in any case more present: MSFTKitchen had found on 13 March a job offer from Microsoft Windows stating 9, and incidentally Windows Phone 9.
If Windows 9 is talked about, we are still waiting for official news from Blue Windows, which will be an updated Windows 8 distinct Windows 9.