Development of Windows 8 is much awaited by fans of Microsoft and PC developers are now in a more advanced stage. Version beta / preview of the OS is rumored to be release in late February and has recently winunleaked.tk has got leaked last build number of Windows 8 which is believed to be in the final version before entering the beta stage.
Microsoft is scheduled to show the preview of Windows 8 internally on January 30. Based on information from the roadmap, public beta for Windows 8 will be labeled winmain_win8b1. Be prepared to taste Windows 8 in a few weeks away.