the real answer is that only Honda and Toyota, and maybe Renault have any stock in hybrid technology. Mercedes, Ferrari, BMW, don't and have anything to gain in the market place with hybrid technology,
the new changes in tech regulations are all about manufactures perfecting technology for their road going cars, so that Ferrari can sell cars with "f1 paddle shift included" and so on, the main reason starting this season that f1 is moving towards less aero tech is because only Ferrari sells cars with high end aerodynamics
now f1 is going green, starting with energy recapture, and in 2011 introducing bio fuels, but they will never go to hybrid unless hybrids gain significant market place in the consumer sector