The linked article (slightly old apologies, from October 2006) relates to how flooding at one mine caused a jump in prices of Uranium.
With the issues about either scarcity of fossil fuels or carbon emissions there have been discussions about Nuclear Power.
It is quite clear that there are constraints on the availability of Uranium.
There are arguments that there is only enough Uranium to produce three years of the world's electricity
One of the problems with Uranium is that it takes quite a bit of energy to mine and process the ore such that it can be used.
What is needed is a proper full cycle analysis of the production of Uranium.
There are three other suggested nuclear energy sources. These are fusion (where deuterium is hammered together to create heluium), the breeder reactor
and the Thorium Cycle
which is a form of breeder.
None have been shown to be effective as yet before we take into account the long term effects on the environment.
My own view is that solar energy through algae will be the best mechanism over time to create a sustainable energy cycle. This will still use hydrocarbons, but they will be produced sustainably.