Amazon Offers Paid Web Database Service
"Amazon's infrastructure is orders of magnitude better than what your average chump can manage themselves."
This is a common assumption, based in part by Amazon claiming that these services ran the same software that ran their store. Well, the store's uptime is terrible, maybe %98, and these services are written from scratch anyway.
I think they have their place, but the assumption that Amazon means good engineering is a very erroneous one. I know, I used to work there.