I've designed Talon (my voice / alt input project) from the ground up for cross-platform scripts/configs. Once I port the OS layer to Windows/Linux you should be able to reuse mostly everything (with some app/os-specific stuff overridden at whatever abstraction layer it makes sense).

What sort of CPU load are you seeing? I'm able to dictate on battery, peaks averaging ~20% cpu. (Dragon is a different beast, peaking to >80% anytime it's over the noise threshold, so you need a really good mic to get good battery life).