Works on eclair, froyo, gingerbread, and now honeycomb, provided your phone was already capable of car mode.
I''ve had trouble with this functionality embedded in Car Dock Home v3. Even google seems to keep their app that enters car mode separate from the market app that acts as a car home.
If you are on a froyo or better phone and have the Google ''Car Home'' icon in your launcher, I recommend using that to enter car mode.
I''m compelled to make this free due to the functionality previously being in Car Dock Home v3 (free)
Keywords: Car Mode, Car Dock, Simulator, Car Home