Thanks, but we've decided long ago not to do any closed testing - there are so many people who want to get their hands on any alpha/beta/preview/etc release we might have that it doesn't seem fair to arbitrarily choose some people to be testers. So basically as soon as we have something that's 1) usable, 2) stable, and 3) contains a reasonably solid copy-protection system we'll put it on our website and send out an announcement.