Hydrogen fired guns

I was watching some science tv today about a rocket program, where hydrogen gas was touted as the most powerful and lightest fuel used in rocketry.
I wondered if hydrogen gas could be used in firearms to any benefit. Wikipedia has an article on an artillery cannon fired by a hydrogen charge, claiming it has greater muzzle velocities than traditionally propelled firearms.

Do any of you think it would be worth the trouble to adapt it to small arms? What are y'alls opinion on it?

Now that I think about it, loading would be a bit of a pain: It would probably require a hydrogen bath to push out the air in the case, be ferried into a mixture of hydrogen and oxygen for even and consistent results. That, and we'd miss out on the smell of gunpowder.