Names, and thus personalized controller settings, confirmed transferable by Wii remote, as Sakurai said they wanted to do but couldn't confirm in the "names" update.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.