Amazon, to the detriment of their Web Services, has been overly secretive of AWS revenue. They list revenue is a category called "other." Their 2008 "other" revenue was $542 million, up 42% from 2007. Analysts are noticing. The first question in last week's conference call was enterprise adoption, but Amazon replied only "We think this is a very significant and meaningful opportunity over time for enterprise level customers." This is not an acceptable answer for a public company. Worse, it could hurt AWS growth, since companies follow each other. AWS is largely used by startups and research groups. The real money is gaining adoption from enterprise (beyond the like sof Woot).