Re: A new shift concept for the engineers....
For those that missed it above, sturmey archer makes a three speed fixed gear you can drive on the left side. It does not free wheel in and of itself. It has splines for fixed sprocket AND threads for bmx freewheel. It is made for fixed gear riders who want a three speed like the awc. Search for the SA s3x 3 speed. released this year. Comes is four colors I think.