This is really neat. If you don't mind me asking/derailing a little, how did you set up this webcam? I've been wanting to do something similar for some time. I'm pretty technically proficient (work in IT) but haven't researched this much yet.
You will need a program and to set up port forwarding.
Webcamxp is what I use and just go to portforward.com to set up the port forwarding.