In which case you know that the next thread that asks for it won't make it come faster.
Current public knowledge is that 1.0 can achieve coldboot and already has warmboot, up to 3.0 is possible and 4.1 is theoretically possible.
But as far as I know there is no known scene person actively working on coldboot. If memory serves me right, SciresM has said to have achieved coldboot on 1.0, but as it was unstable and with caffeine available not of importance.
A potential modchip by TX is rumoured, but no evidence of its existence and capabilities has been seen yet. If it works it should (at least) allow piracy (its GW/TX after all) and potentially CFW.