Minis ARE a legit thing. They are AKC FSS registerable now as Miniature American Shepherds. 13-18" tall and 20-40 lbs on average. So sheltie to small aussie in size.
Here is the breed club for the AKC version:
http://www.mascusa.org/
Minis have been around almost as long as aussies have. The drama was due to some mini people saying their dogs were a miniature size variety of aussies. The ASCA does not recognize aussies in size varieties and AKC will not accept new varieties of existing breeds. So they switched the name to avoid drama. Studbooks close in Dec 2014.
I was actually supposed to go to a mini aussie (er... american) show today but was sadly unable to.
I like the size range on minis better (most aussies I know are like 50+ lbs). They are very popular in disc dog.