HERNDON, Va.--(BUSINESS WIRE)--XO Communications (XO), a leading national provider of advanced IP communications, has been recognized by CIOReview magazine as one of the “20 Most Promising AWS Solution Providers of 2014.” CIOReview assesses AWS providers on an annual basis and publishes a special edition of its magazine in order to highlight those providers and help CIOs make the best decisions in the AWS marketplace. XO announced that it joined the Amazon Web Services Partner Network in April