I don't know how Datel figured this one out, but here you go:
http://www.nintendoworldreport.com/newsArt.cfm?artid=13317
http://www.nintendoworldreport.com/newsArt.cfm?artid=13317
Manage Your Wii Mii...
...It's easy with My Mii Manager!
April 10th, 2006 - Wii owners can now personalise their Wii Mii the easy way.
Datels powerful Mii Manager software lets you edit your Mii on your PC. Its a doddle to use. Just import your Mii into the editor, then edit it until your hearts content. You can even share your Mii with Wii gamers from all over the world over the internet!
My Mii Manager has everything you need. Theres the powerful Mii Manager software application for your PC, and a USB Bluetooth receiver to let you use your Wii-mote with your computer.
My Mii Manager is in the shops now, and costs £14.99 UK or $19.99 USA. It can also be bought direct at www.codejunkies.com or by calling 08456 010 015.