With cloud computing services now formal members of the technology management portfolio, the challenge shifts from understanding cloud to selecting the right partners. Most hosting companies, managed service providers, and software companies are jumping into the cloud business. But are they really delivering the cloud computing values of agility, autonomy, scale, flexibility, and pay-per-use economics? This report gives an overview of the landscape of cloud service providers to help CIOs understand the makeup of the market, business model differences between the tiers of players, and how best to select their strategic partners and negotiate with providers to achieve the greatest benefits.