Windows 7?

On microsoft website, it is stated that it is going to be available on oct 22

So, why is the windows 7 cd's in stores?

I thought these were beta version but the shop keeper said it's full version

/\ It would be RC version.

[quote=", post:, topic:"]

/\ It would be RC version.
[/quote]

Oh, thanks

How to check if i am using the beta version or RC version?