YOu can use the download links http://download.windowsvista.com/preview/b...86/download.htm but you can no longer get a product key.
I don't know... IMO I wouldn't recommend downloading it just yet as its a beta and it still currently has many bugs. Just wait for it to come out. ^_^ Snipe.
My Dad payed like $15 and got it mailed to him, and so far it works great. He loves it. He hasn't noticed that many bugs.
Beta 2 was available for public download, But I believe they took it off, because they had enough testers