I can scan all QR codes just fine, now if any QR codes are pointing to the 2.X marketplace apps (which are not allowed on 1.X marketplace) that's another story. It's like trying to put a windows 7 application on a Windows 3.1 operating system.. its just not gonna jive very well.
But scanning QR codes.... are not a problem.
It's coming... just weeks away from deadline, and no im not tired at all. i'm happy with what I have even if 2.x doesn't come out. If your in the tech world for any amount of time, you'll realize you can NEVER keep up. it's impossible, our phones, and yes even the NexusOne is already old news... all OEM's hold back their most powerful stuff until the market pays them their money's worth for the old stuff, then they release their latest gadget, and thats old news because they have an even better technology they are already working on... its called R&D.
you will never keep up so dont get frustrated. =-)