Animation Walk Cycle Resources

Very basic breakdown of the 8 frame walk cycle, intended for Flash but easily adaptable to Harmony:
http://animation.about.com/od/flashanimationtutorials/ss/flash29walkcycl.htm

Good overall reference, a bit more complex:
http://www.angryanimator.com/word/2008/11/01/animation-tutorial-2-walk-cycle/

This is a great page with examples and tips on creating walk cycles:
http://minyos.its.rmit.edu.au/aim/a_notes/04_walkcycle_project.html#

Videos showing real people walking in different ways, front and side views:
http://thinkinganimation.com/great-walk-cycle-reference-endless-reference-2/