Take your Mii with you even after you put down the Wiimote with these hand-sewn Mii Pins, $10.50 each from Etsy. Right now there are only four characters to choose from, so hopefully you already resemble one of them (or know someone who does). If you're really desperate for a custom Mii pin, maybe you can cajole the artist, Craftsholic, to make one with your own Mii.
They're pretty cute, but considering that I don't think Mii Cake Toppers are going too far, I may be alone. What do you think?