Just a thought:
It gets so frustrating when you post a tournament and it just sits there, and those you've challanged can't make it, or open tournaments take too long to fill.
At the bottom of the "Polls" posting area, there's a button that says "Let Poll Run For - Days". Would it be possible toadd a button in the Challange screen saying "Let Challange Stand For 'x' Days", and you enter the days you want the challange to stand?