End User Development (EUD) of system applications is typically undertaken by end users for their own, or closely aligned colleagues, business needs. EUD studies have focused on activity that is small scale, is undertaken with management consent and will ultimately be brought into alignment with the organisation’s software development strategy. However, due to the increase pace of today’s organisations EUD activity increasing takes place without the full knowledge or consent of management, such developments can be defined as covert rather than subversive, they emerge in response to the dynamic environments in which today’s organisations operate. This paper reports on a covert EUD project where a wide group of internal and external stakeholders worked collaboratively to drive an organisation’s software development strategy. The research highlights the future inevitability of external stakeholders engaging in end user development as, with the emergence of wiki and blog-like environments, the boundaries of organisations’ technological artifacts become increasingly hard to define.