It would be a real treat for the general Public, if the beta is available for all.
Apart from a brief reference to an associated remark made at a PDC,often repeated, I have never seen a substantial statement from MS that it would be available for all, however. It matters little though. With the present official distribution list, it will be available on many sites for download within days, or even hours, of the DVD being issued.
If I read correctly, the present download which can be found by browsing, 7000, is the beta.