E-governance can be considered as the core and most important challenge of smart cities initiatives. It refers to the use of information and communication technologies in the public sector with the aim of improving information and service delivery, reinforcing government transparency, accountability and credibility, and encouraging citizen participation in decision-making processes. In this paper, we survey the state of the art in recommender systems for the e-governance domain, showing that there are few studies on the topic and that published recommendation approaches are quite simple and focus on a very limited number of applications. Moreover, we propose a number of challenging e-governance scenarios where recommender systems could be exploited, and thus represent new research opportunities.