´ruge´ is very close to ´brood´ 20:55 Dec 22, 2011
Both as in what a broody hen does, sitting on her eggs and watching carefully over her chickens, and roughly the same as brooding over ideas. (In both languages this is a somewhat dark and gloomy kind of thinking, not quite worrying, but not cheerful.)
The word also has an element of watching over the ideas, and is more live than an incubator.
For me there is an element of hothouse over ´rugevugge´, and it is a very unusal word, though immediately understandable. AS long as the incubator or the rest of the context gives the idea of care and attention, I think it is fine.
´Vugge´ is also very much used at this time of year about an event some two thousand years ago! Some TLC definitely has to be implied as well... | 
