Use Dolphin Wii Emulator

1. Checkout git repository:
   $ git clone https://code.google.com/p/dolphin-emu/
2. Select specific version:
   $ git checkout 3.0
3. Prepare Makefiles:
   $ cmake .
4. Make binaries:
   $ make
5. Install dolphin:
   $ make install
   or
   $ checkinstall

Now find some game and enjoy!

Sources: Dolphin GoogleCode page