Why Nokia won't offer Android device is very easy to explain: Nokia is trying to get into the service business, Android forces the user to use Google services.
I don't agree with Scoble's premise to his whole "analysis" - no carrier in the US is quite as *married* to a single platform/manufacturer as he tries to make it sound. And when he says "I�ve seen the new Nokia OS, just a month ago.", I'm really not quite sure what he's trying to say. It's still Symbian, it's still S60 - there's nothing fundamentally new about it other than a new home screen and a few tweaks here and there.
If he means that S60 needs an overhaul, I basically agree. But despite all those new smartphone wunderkinds, I think S60 works well - if Nokia/SymbianFoundation:
-updates the UI looks a bit (which I guess will come with Symbian 9.5 and ScreenPlay)
-overhauls some basic issues (better text entry a la SE, threaded SMS finally part of the default system, more flexible and functional homescreen as default, HTML emails, better Ovi and other services integration with syncing of stuff, small details like graphical smilies and a couple of other things that really should be do-able quite easily)
-adds a few shiny new core applications like a better browser (maybe by completely teaming up with Mozilla?), "cooler" media center app (shiny stuff always impresses people, after all) and a replacement of the default mail app with a merged Messaging/MfE/Notes app
-ADD A PROPER APP STORE!
the public impression of S60 might change quite a bit, without huge changes or massive effort.
And if they finally consolidate their services to a coherent whole, they're actually pretty well positioned imho.
And in any case: Nokia is at least trying to get more phones to the US. AT&T seems to finally pick up the E71, and I wouldn't be surprised if some carrier takes up the recently announced E63 NAM as well. As low-cost consumer QWERTY device, I think it might do very well in the US market.