I've read a book published by the editors from Scientific American titled "Oil and the Future of Energy". This is a compilation of articles from Scientific American, of which the following articles discuss the viability of a hydrogen economy (I've neglected the volumes, issues and pagination since I've extracted the data from the book):
Lloyd, A.C. 1999,
The Power Plant in Your Basement, Scientific American
Wakefield J. 2002,
The Ultimate Clean Fuel, Scientific American
Wald M.W. 2004, Questions about a Hydrogen Economy, Scientific American
Grant P.M., Starr C. and Overbye T.J. 2006,
A Power Grid for the Hydrogen Economy, Scientific American
Ogden J. 2006,
High Hopes for Hydrogen, Scientific American
Many of these articles may be found online in .pdf format. If you're ever interested and have a few hours spare, I would recommend them for reading.