Comes from the official website:
Guess we now have a list of compatible amiibo in MK8.
Credits to Joe Fourhman for the find!
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Edit:
http://mariokart8.nintendo.com/img/amiibo/amiibo-racing-suits.png
In order to use this feature, users will need to download the software update available on 11/13/2014.
Guess we now have a list of compatible amiibo in MK8.
Credits to Joe Fourhman for the find!
***
Edit:
Sadly Nintendo haven't uploaded the images yet, but there will be one called "amiibo-racing-suits.png". So we will at least get a look at the costumes.
http://mariokart8.nintendo.com/img/amiibo/amiibo-racing-suits.png