new challenge?

so for the top ten lists, i'd like to see if you'd like to add a rule:

i'd like us to be able to challenge each other to a top ten list (within our range of knowledge and experience). this would have to be done a week in advance, when one of us posts her top ten list, she would have to put the challenge at the end. so if i'm posting a top ten, i would put at the bottom "challenge for next week: top ten (things colored orange, ways to prepare apples, potholes in spokane, etc.)."

whaddya say?