The domain needs to be a new registration as mentioned in the thread and frankly speaking, I don't think you can find an unregged domain / recently expired domain without a tool like DRT.
Even if you do pick up the name from one of the drop catchers like Pool or Snapnames you might have to pay in excess of $1000 to get a domain making $100/month on PPC. I am sure the market dynamics will make you pay a fair amount (what with so many people bidding for a good domain).
And lastly we are sure that if you are using the DRT, you already are well known amongst domainers and would not risk your reputation over a contest.
