I use the D-Link 1000W. It works great. I needed a PC only once, when I wanted to upgrade the firmware on the webcam. Other than that, I've had nearly flawless operation from it. You'll need to connect to it 1st via ethernet, to make initial settings. Once that's done, you can log into it wirelessly through it's IP (which can be from DHCP or static). If you need any specific help configuring yours, feel free to post back. D-Link is not the best for clear directions and Mac issues.
I'm hoping to connect mine to an APXP soon, when they start shipping. This will allow me to make some network changes I have wanted for a while. Of course, if this works, any ethernet web cam would work. You wouldn't need the wireless capabilities of the 1000W.