Ok, I have too much time on my hands.
I knew my Grandpa Neill had raised registered Angus cattle
The problem was the site only allowed me to search based upon the name of the animal. That made searching difficult. Putting my last name in the search box resulted in more hits than I had time to view, and apparently there was a Neill farms in Corydon, Iowa, that also registered cattle.
My search for "carthage" (where my grandparents lived) resulted in fewer hits and after some browsing, I found Carthage Barbara, registered to my grandpa with a 1952 dropdate (err..birthdate). Clicking on the sire or dam name allows one to browse the pedigree, much like worldconnect.rootsweb.com.