How do you get them because I want windows 7 beta 1 for free when it comes out and I hard that there are new media centers and beta software which are really cool.

go to PDC08 or WinHEC

Perhaps it will be posted for Technet / MSDN Subscribers

where is the PDC or WinHEC?

I mean like when the first release of Beta versons are avaliable to most people how do I get one of the products to test.

Betas will be out on connect.microsoft.com if you were invited to the beta test by MS.

The PDC08 is from October 27-30, 2008 in Los Angeles Convention Center in Los Angeles

The Windows Hardware Engineering Conference (WinHEC) will also be at the Los Angeles Convention Center, Los Angeles, California. November 4-6, 2008

I get mine via Microsoft Connect also