SRAM PowerLinks and SRAM PowerLocks are different. PowerLink is what their 8 and 9-speed master links are called and are considered reusable, at least for the life of the chain they came with. PowerLock is the 10-speed master link and SRAM claims they are not reusable once removed.

Note to Mudpie: The only chain I've ever had to repair on the road was a Campy. Not mine but another rider's. I personally have never had a Shimano or Wippermann chain fail and I typically use them for 6000 - 8000 miles before replacement.