Coal-to-liquid conversion seems to be the way to go with transport fuels. There is enough coal for hundreds of years with current use, which means that even with greatly increased use it will last tens of years. Here is one summary.

The other interesting development is electric cars. However, they need much better batteries than are currently available. Also the present-day electric wires won't carry enough current for quick recharging.

There are two problems with the biofuels. First of all, they need almost as much energy to make as they contain; this means that they are a means of storing energy, rather than making it. Only in few countries, like Brazilia, they can produce a lot more energy than making them consumes. The second problem is that you need a lot of cultivated area to produce enough biofuels to match current demand.

Agree with pretty much all points. Of course Coal has other problems such as pollution, and the fact that it cannot be used in as versatile ways as oil (plastic, pesticides etc.).

Electric cars can already be made economically if need be, but replacing the infrastructure of the petrol-driven cars would take hundreds of trilloins of euros/dollars.

Biofuels are net energy losers for most part (especially in cold countries such as Finland), so they don't seem offer much for our energy future.

My vote is more public transportation, greater efficiency, and new world-wide Manhattan projec-style undertaking to rid us of the oil addiction. Unfortunately, I am not holding my breath. :(