Still a few hours away for CES, it is known that Microsoft is going unveil the Windows 7 Beta at CES. But it is still unsure when would users be able to download it officially. Mary-Jo Foley reports that public betas of Windows 7 would hit this week along with the private beta.
Now, there is some information available from this Microsoft blog: Attend an upcoming MSDN Developer Conference and you will receive a Windows 7 Beta 1 DVD – and that immediate upcoming MSDN Developer Conference is on January 13th, which is next Tuesday!
At the worst, expect a public beta release next week as the private beta testers would get priority even if its released earlier. If you are one of those lucky testers who received a beta invite, then expect a beta download late January 7 or early January 8.

Source- Neowin