The "Alexa" name is starting to get confusing. Amazon already owns something called Alexa, a website/service which provide information about a website's stats and ranking.
Worse, Amazon also offers an API/SDK to Alexa via AWS [1], which offers a surprising amount of information about a website that they gather (Global Rankings, regional rankings, standard <META> tag scrapping, DMOZ info, IP/location info, email address/telephone/address and other contact info, bunch more stuff). It's actually pretty amazing, but the API and documentation is terribly out-of-date.
This got my hopes up that Amazon had done an overhaul of the Alexa rankings/info API... [sigh]