Well, actually I was speaking of the whole system - hydrogen isn't really any more dangerous than propane or natural gas. In fact, it's less dangerous in some ways because it's very difficult to get it to accumulate. Germany is already producing a certain amount of H2 which it just feeds directly into the existing gas infrastructure to supplement natural gas supplies.
On top of the fact that H2 isn't actually any more dangerous to handle than other gases we already use without any special concern, a number of options are being floated to reduce the need to actually cart large quantities of hydrogen around:
For one, since H2 is readily produced by hydrolysis some of the auto companies interested in FCEV technology have developed filling pumps that generate the H2 on site. Solar generated electricity is used to generate H2 from mains water (not sure how they deal with the impurities - pre-distill maybe?) and the same power source is used to pump it into storage tanks that wait for the next car to come along. Honda and Toyota in particular have experimented with this sort of system, though it seems to have disappeared - I imagine there were practical issues, and the expense would have been quite high.
Reformation from readily transportable materials is another popular one - methanol, natural gas, and other materials can be reformed to release H2 and CO2. This is the cheapest method, but not popular since the CO2 released sort of defeats the purpose. Though with modern sequestering technologies maybe this isn't such a bad idea - since the CO2 is being produced by the filling station rather than the car, it can be easily captured and repurposed - for example as the fluid in geothermal power plants. Mitsubishi for example has an interesting plan to use supercritical CO2 in a geothermal plant-sequestering joint project here in Japan. This article refers to a different project but is the same tech and has links to interesting articles for further reading:http://thinkgeoenergy.com/archives/13821
Another more recent idea is from Japanese gas company JX, which has developed a system of dissolving H2 in toluene so that it can be transported in the same tanks that gasoline is, and stored in much the same way as gasoline at filling stations. On-site re-gassing technology extracts the H2, compresses it into service pumps for filling vehicles. Not sure what they intend to do with the toluene, but presume they would use a 2 tank system - truck in "full" toluene and return "empty" toluene to the plant for recycling. I'm not a fan of this one because of the toxicity of toluene and again it relies on petroleum which defeats the purpose. However, the concept gets around the technical and legislative difficulties surrounding transport of H2 under pressure quite neatly, and it reduces costs significantly so it may be a good first step. http://asia.nikkei.com/Tech-Science/Tech/Technology-promises-to-make-hydrogen-as-cheap-as-gasoline