The fact is, you have the choice whether or not to upgrade to the CC product right now or wait for LR. You also have the choice to live with whatever you already use for photo management until LR is added to the Creative Cloud.
I'm guessing adding Lightroom to Creative Cloud is actually made MORE difficult due to the fact that the LR4 upgrade was released prior to CS6/CC. I'd assume that the LR licensing system is being retrofitted with the CC licensing and the install process is being integrated into the Adobe Installer process that the rest of CS6 uses. Lightroom has always been kind of an odd duck (it was the first Adobe app I can remember that had cross-platform licensing and it has never used the same install process as the rest of Adobe's apps). While CS5, 5.5 and 6 all use "Adobe Installer," Lightroom 4 is a standard Mac OS X package (on the Mac, I don't use Windows). It's going to take a while to integrate LR into the Creative Cloud. CS6 got the benefit of being developed and released alongside of Creative Cloud.
I'm sorry Adobe isn't giving you a drop-dead date, but they're actually being smart with that. If they told you June 1 and you made decisions based on that and that slipped (even a few days) you all'd be back in here moaning about how they missed their deadline and every news outlet in the world would give them guff about it. If they use nebulous language like "a few weeks" then you're (and I share this) a bit frustrated now, but it gives them a little flexibility in case things slip a bit.
I'm hardly an Adobe apologist (I think they've been a pretty abusive monopoly for a while now), but there are valid software development reasons that LR might not make it in on day 1. I also think Adobe deserves kudos for putting out a reasonably-priced subscription model and the new CS6 apps are awesome. I'm cautiously optimistic that they've turned the corner back to a company that I can get behind again.
