This is interesting, but it is hard for me to figure out exactly what Amazon has agreed to.
The CNN article that I read simply states that Amazon will drop its referendum if Calif. pushes back the effective date of its internet tax bill by a year. There is no implication that Amazon will collect sales taxes after that time.
The LA Times article above implies, but does not clearly state, that Amazon has agreed to start collecting sales taxes after the year period is over.
And the headline on this Reuter's article
http://www.reuters.com/article/2011/...7877R820110908 begins "Amazon.com Inc's agreement to start collecting sales tax in California next year...".
So I'm not sure what is actually going on. It also look like Amazon hasn't commented on the agreement.