The hype cycle surrounding Software as a Service (Saas) has been building for to a crescendo over the past several years. Enterprise Resource Planning (ERP) holds a special place in the grand scheme of SaaS. While companies seemed willing enough to let the applications that surround and extend ERP reside in a SaaS environment, they were less willing to place their systems of record in a cloud they did not specifically own or control. Today that is changing and as many weight the pros and cons of SaaS ERP, the advantages appear to be winning.