I was flipping through a Midwest Ag Journal from last month and noticed a press release for a company in Kansas that is ( http://www.hoodco.com/soilpreparation.htm ) now importing this harrow from Australia:
http://www.kellyengineering.com.au/pro_mulch.htm

Has anyone seen this harrow in action?  How does it handle corn residue compared to an Aerway, Genesis, or SMART-TILL?  I can't seem to get the videos to work on Kelly's website. 

http://www.aerway.com/English/products/AG/min_till/index.html

http://www.genesistillage.com/40_Foot_Aerator.htm

http://www.hccincorporated.com/smart-till.htm 

I looked and see a number of great comments about the Aerway, Genesit, and SMART-TILL products in this thread:

http://talk.newagtalk.com/forums/thread-view.asp?tid=92224&mid=655800#M655800