arduino with wiimote? where to start?

Much better. Yes and those links should get you started. As for BT shields that can communicate with the Wii controller, that you may need to shop around. I have seen a USB shield with BT dongle work with a Wii remote, but as for the code, I dont know where to find it.

Im sure this forum has plenty of Wii remote topics to chose from, so do a search and go from there.