During an interview with Kotaku, Mr. Miyamoto mentioned each Wii controller may have a built-in profile system which could allow for customisation of looks and settings, which will be determined by which Wii controller turned the Wii on.
Mr. Miyamoto also touched on Wii/DS connectivity mentioning once connected the DS could effect gameplay via touch screen and microphone. He also said another possibility is to download information from Wii to DS, edit it, the re-upload the data back to Wii.
Source: Kotaku
