I have a linksys wireless-G IP camera and it does not work under Mac OS X. For some reason when you try to view the live video feed it does a browser check and displays an error. I have tried to strip the html and java out of the camera to see if I can view it another way, but have got to a brick wall. Therefore, have given up.
It worked fine when viewing through IE on a PC. But it would not even work on IE on a Mac!
BTW it streams a .wmv file (Windows Media Player, yuck!).
Also if you are thinking of this camera it does not support WPA wireless encryption which my house has so the camera is now a no-no and would need to be connected via its Ethernet port.
It is now a nice wall mounted sculpture in the kitchen. I used to use it as a puppy monitor when I got a new dog. I used to check on it from work.