AppNexus is a cloud computing infrastructure company founded by Brian O'Kelley and Michiel Nolet. It aims to solve scaling, globalization, and integration challenges faced by Right Media through a global cloud architecture with multiple "Nexuses" around the world running the same services. It plans to generate revenue through renting servers and storage, bandwidth, backup services, and profit-sharing with service providers. The company's growth plan involves attracting applications to use its cloud which will then attract software providers, building network effects. It has 3 phases - building the initial cloud infrastructure, gaining credibility by recruiting major platforms, and focusing on network effects through partnerships.