I've written about the Hydrogen Economy before, but I just uploaded a 100MB Quicktime Movie from ECD about hydrogen fuel storage technology and the hydrogen economy. Features Stanford R. Ovshinsky (CEO/founder of ECD) and Bob Stemple (Chairman of ECD and former chairman of GM). ECD invented Nickel Metal Hydride Batteries (NiMH). The basic phenomenon of NiMH is a solid material that can absorb hydrogen. It is quite stable. The battery works by storing and releasing hydrogen inside of a closed container to store and release electrical energy. Similar materials can be used to store hydrogen fuel as well as to convert hydrogen to electricity in the form of a fuel cell.
The problem is fuel cells are still a ways away, storage is difficult and the infrastructure for production and distribution is not in place. ECD's solution, which I think makes the most sense is to use their solid storage system for storage and distribution, make a hybrid vehicle that uses a hydrogen combustion engine and a battery. Long term, we should switch from making hydrogen from fossil fuels and put in place a solar powered electrolysis network. The first phase looks like: fossil fuels->hydrogen->solid storage based distribution->hydrogen combustion->batteries->electricity->power. This will get us started. Eventually it should go to solar->hydrogen->solid storage based distribution->fuel cells->electricity->power.
I used to work for ECD and am still involved with the company so I'm a bit biased. ;-)