An easy variant for the 4th edition Halfling Rogue
1) now finds secret doors only on a 4,5 or 6
2) moves a max of 4 spaces when moving instead of 5 spaces.
3) when moving may stop and " Listen" at the door of a room. Listening works just like the ESP medallion.
4) 10,000 GP to win
This is the Halfling variant from The New Dungeon
Very cool. I printed this up and popped it in my rulebook. I'll be using this as an option.