27 p. Written after the Aveiro CMDE 2006 conference where I was an invited speaker; reworked and unpdated Spring 2008, as the book was somewhat delayed. ; After an overview of the worldwide mathematical journals ecosystem, we summarise some of the hopes and fears raised by the digital environment. We then review the underlying principles and main features of some of the projects launched by Cellule MathDoc that aim at settling robust foundations and giving wider access to academic mathematical research journals. In turn, they could prefigure some building blocks of the digital mathematics library, which is still to come into being.