Lightweight and ruger are not normally in the same sentence when discussing their revolvers. It does look interesting though. It'd be great if they make something Ruger-strong that doesn't weigh a ton.
I played with the LCR at SHOT show. It was interesting, its pretty light. The guy said there was some kind of cam over trigger in it, but i couldnt feel it getting any lighter through the stroke. It is very compact and seemed really smooth.