(It's hard to find a webcam without a microphone, actually, but if you're buying a really cheap one, do check!) It's worthwhile going to a large computer store (Comp USA, Compusmart, Future Shop, Best Buy, or whatever's large and near you) to have a look, as they tend to have one of each webcam set up and connected to a computer, so you can compare image quality.Once you see a scene you like, you can start to play the video or check out the stills in the photo galleries.
I'll go over a lot of things, seeing as people seem to want to know all about webcams! I've included a screenshot of Photo Booth, the bundled Mac program which came with your computer (if you have a Mac with a webcam), and a photo of the i Sight camera on a Mac Book.
Now you've got a webcam, you probably want to talk to some people. Windows Windows Live Messenger is your friend here. If you don't want to have to download things (and frankly, who does? It's an online version of Windows Live Messenger, so you'll still need that Windows Live account (which, by the way, you have if you have a Hotmail account). Chat is one place to look for chat rooms, and is another.
We'll cover a few scenarios here: Mac Let's say you want to talk to your friend, who also has a webcam, on a Mac. Be extra safe online, and never meet up with anyone in real life from any of these video chat places.
There are a few options, the easiest of which to use is probably i Chat, a program which both of you already have. I can't really offer much other advice, except "don't download dubious downloads" and use as much common sense as possible.
Your project was not published because it could use a bit more work before it goes public.