R.I.P. Mr Simmons. Nuclear is the only current long-term solution that has the possibility of replacing oil, but unforunately still has too much stigma attached to it, and the start-up times are forever. France is probably the best nation currently set-up to deal with peak oil, as far as energy generation goes. Last I heard, they had something like 15 nuclear reactors, providing most of their energy generation needs. In a mobile form, nothing else comes close to providing the energy density of oil.
Prior to the most recent recession/depression, the generally agreed upon peak oil date was 2010-2011. Without some fresh bull market oil demand, this means peak oil is probably pushed out a few years till 2013 or 2014.