Google started this trend of only hiring whomever can prove her/his worth to the company. Lately, I found a nice career announcement for a small startup company in Montreal that requires users to prove their programming ability before sending their CVs.
The trick was nice and relatively easy to solve but the appeal was really strong.
Check it yourself and try ur best. Give it a shot during a calm cold evening.
http://www.proveyourworth.net/
