http://www.miicreator.com/

Using the above link, give us an approximation of your appearance. This creator is not exactly what the Nintendo Wii is capable of (Wii's Mii creator has less features, at present). I don't see a way to export your Mii into some format, so you will have to take a screenshot of your completed Mii and crop out the unneeded bits of the interface, your desktop, etc. Maybe there is an export function there and I'm just not seeing..

This is my "Get off my lawn!" impression.