If you are thinking about $200 for several cameras and the software, then it is not possible if you want quality video. You can find really cheap cameras out there, but they won't last long and the image quality stinks.
Go to 66.166.130.110 in IE5.5, choose MPEG4 encoder, on the next page it will download an add-in to IE then let you choose your connection type, if you are on a high speed connection you can choose how many cameras to veiw, on the 1,2, or 4 camera veiw click on play or choose option then play on the 8 or 16 camera veiw, user Guest password 1234.
Questions, let me know.