Microsoft has announced that Windows 7 Beta downloads are no longer available.
Although you can not start downloading the first public available beta version of Windows 7, if your download is interrupted somehow, you can finish your Windows 7 download.
If you have not already claimed for your Windows 7 Beta product key, you can still get your key from
Windows 7 Home - Beta Download pages.
For whom who has downloaded and installed the beta version of Windows 7, please be aware that the Windows 7 Beta will stop working on August 1, 2009.
I feel myself lucky. Since I had downloaded and installed my Windows 7 Beta system. And the good part is that the Windows 7 seems to be working perfect :)