From the reviews that I've read, it isn't quite ready. Has anyone integrated one into their development process?

The Leapmotion is designed for analog input. Typical software development is nearly all digital input: hitting keys and such, which is something that you have to sacrifice in a system like the Leapmotion or a multitouch surface. I could see it being a lot more useful for games or graphic design.

There's been a few people playing with them reported on hackaday[1]. I'd agree with that assessment that it's not quite ready but they are definitely getting close.

[1] https://www.google.com/search?q=site%3Ahackaday.com+leapmoti...

Thanks for the link!