Does it work? Well, yes it works very well!
Via a web browser on my Mac, I can view video, tilt-and-pan the camera, and control things like the infrared lighting. It doesn't need any special software or plug-ins for my Mac, and I can even view the thing from my iPhone.
|My EasyN WIFI cam, mounted upside-down on my porch ceiling|
The camera sensor isn't nearly as good as a "real" camera, but I'm still very happy with it. I haven't gotten the microphone to work on it, but I don't use it that way.
For under $50, it's a pretty darn good security camera. You can find the EasyN F-M166 on Amazon.