If we go by what is written in the FAQ, yes we should be closing any question that is about Ubuntu+1. However, the agreed upon consensus about the Ubuntu+1 questions is that we allow questions about features that we are sure will not go away mid way through the development release and is generally useful for the masses when they are released for the public. Bug reports and discussion types will be closed as normal. This consensus never made it to the FAQ and so naturally, most new users and veteran users assume that all Ubuntu+1 are off-topic.
If we take this into account, those two questions about Amazon search results should not be closed as it can be useful for people when they eventually upgrade to 12.10 and it is a major feature that we can be sure will not be removed, particularly given that the development cycle is at the point of feature freeze and beta-2 milestone freeze.
Now, I think we should state the scope of Ubuntu+1 questions explicitly in the FAQ in order not to misguide users. I suggest we allow all questions about Ubuntu+1 once they are after beta-2 milestone (feature freezes doesn't necessarily mean no more features will be added). In addition, we can also entertain Ubuntu+1 questions that are of some value to the general public like those of HUD and webapps, regardless of which point in the development cycle do they get introduced into Ubuntu. This way, we can ensure that the questions don't lose their value in a matter of days or even hours.