As the release of Live 6 nears, more beta serials are available, so if you’re the bleeding edge type, go grab it here:
As each beta fills up, that list closes again, so if you’re not successful give it another go. Of course, this may be moot, as we may have a finished release of Live 6 soon. I wish more developers would consider doing large betas as Ableton does, as I think it has the potential to produce more reliable software (with a significant added workload for the developers, of course, getting bug reports from more people).
Updated: The beta seems to be out and public, without the initially restrictive groups. Today’s beta comes labeled “Release Candidate 3”. I’ll let you do the math.