Yeah, from the sounds of it - you just need any old webcam. The way it's displayed on the screen comes down to software, not the webcam itself.
Some things to consider:
- Noise of where you will be - If you will be using this somewhere noisy, it might be a good idea to get a webcam and a headset with microphone. Otherwise an intergrated microphone would pick up a lot of background noise.
- Resolution - If you are off into the service, don't get anything too high. You don't want to get a high resolution camera just to find out that the internet connection you are on is too slow to send the video off.