Vienna 

Dude, seriously.  WP:RS and WP:V don't get thrown out the window just because Mary Jo Foley of microsoft-watch.com provides an unattributable and unverifiable quote from a so-called "spokesman" about the change in name.  Nobody at Microsoft with a name has bothered to come out and say "Yes, the name is Vienna" in the last few days.  Doesn't that strike you as somewhat odd?  We can trace back the origin of almost every other recent code name to a blog entry by a developer team, or a page on Microsoft's web site.  Not this time.  I'm not going to bother with renaming back to Windows Blackcomb, since you'll probably change it back to Vienna without bothering with that nagging Wikipedia requirement of verifiability.  This isn't a race.  
Okay... What's the point of these constant reverts back to Blackcomb? I'm really sure now that the codename is "Vienna". The change was recent, let's not make a big deal of it not being mentioned everywhere. No offense, but you seem to like the name Blackcomb much better than Vienna. Get over it. It was changed. Now it wasn't only Scoble who confirmed it. My guess is they were trying to keep it secret for some reason. Several sources claim it's "Vienna", so let's keep it that way. There were rumours about "Longhorn" being changed to "Vista", but later it was confirmed. Let's just leave the article alone for right now. —