Some awesome news of an adapter for mutiple console use, first i have heard of it so here goes:

Cluster has released a NES/SNES/N64/SMD/DualShock gamepad to NES Mini, SNES Mini or Wii remote adapter. The design is based around an ATMEGA16A microcontroller with 16MHz crystal oscillator (also supporting ATMEGA8A @ 8MHz without N64 support). The project is still in Beta phase and packs an impressive set of features. You can play NES mini, SNES mini and Wii virtual console games using original NES/SNES/N64/SMD/DualShock gamepad. You can also connect Wiimote to PC via bluetooth and use original NES/SNES/N64/SMD/DualShock controllers with emulators.