We know that Microsoft would be releasing Windows 8 consumer preview on February 29 and according to various sources the consumer preview build would be build 8250. Today couple of screenshots has been posted on the Chinese site PCBETA showing that build 8250 has been compiled. Here are the screenshots of build 8250
(http://i44.tinypic.com/25gatqf.jpg)
(http://i44.tinypic.com/2l9quc0.jpg)
Various sources are indeed claiming that Windows 8 build 8250 has been compiled though the complete build string of this build is currently unknown. Also according to various sources Microsoft has provided this build to various major OEM partners.