Hi, everyone - the second Alpha RC is now available. We're fairly sure this one is actually installable. :)
Please note that we don't have live images that are really testable as equivalents to rc2 yet, because quite a lot of packages which were cherry-picked for rc2 have not been approved as updates yet and so are not being included in live composes. So for now I'm afraid you can only do the desktop testing by installing from the DVD and selecting the appropriate package set manually.