I think Mile-a-Minute starts with a strip and you add small pieces to it. (put the strip down face up and put scraps face down and sew...cut and add on.
Crumbs start and continue to use smaller - odd shaped pieces.
I'll try to find links by searching.
http://www.quiltingboard.com/t-6951-1.htm
Crumbs:
http://www.quiltingboard.com/t-47601-1.htm
Mile a minute
http://quiltingisstillmypassion.blog...-tutorial.html