Microsoft has made the announcement last week that they will extend the beta signup period for the Windows 7 Beta until February 10. This is actually the second extension of the beta signup program. Microsoft wanted to initially hand out the Windows 7 Beta to a limited number of downloaders but quickly changed their stance after experiencing troubles during the signup phase.
Plans were to end the public beta phase on January 24 which got then extended again last week. Users who start the beta download until February 10 will have time until February 12 to download the Windows 7 Beta from the Microsoft servers.
The product keys that are needed to run the beta version of Windows 7 after the initial 30 day activation period will even be available after that day since MSDN and Technet subscribers will still be able to download and install the beta version.