Quote: "@ShellfishGames - Please do as I'm very interested in getting one."
I finally got around installing it. Unfortunately I couldn't really test it though, as it doesn't run on XP/Vista and I haven't got access to a Win7/8 PC right now. Still I was able to check out the debugging visualization tool that displays the Leap's representation of my hands. It seems very accurate, fast and mostly stable. But the space where it accurately detects movement seems to vary a bit for some reason, and every time I moved my hands out of this space, nothing was detected for the next ~2 seconds, which is kind of strange. However, that is probably a problem of the debugging software and not of the Leap Motion.
Anyway - that's really all I can tell you right now. Hopefully I'll be able to properly test it on another machine within the next days.