Funny anecdote:
I checked out Twitter for the first time in a while to see if anyone was talking about the Amazon outage. I ran a search for "Amazon", and one of the tweets I saw was Scott Hanselman linking to his review of the Amazon Kindle Paperwhite, which included a review of the Kindle Cover. The review was pretty convincing, so I ended up buying the cover yesterday night.
So in a way, Amazon's outage yesterday directly resulted in me ordering a $35 product from Amazon.
This probably (inconclusively of course) confirms what other people are saying here - I'm not surprised that Amazon gets some free PR from this mess, which earns evens out any potential lost revenue.