Hello John Veatch,
Yes you can.
But you still need to have a computer attached to the iSight to do that. By itself, the iSight has no means to do anything except send FW packets to a Mac OS computer. The software, like that shown below would take care of sending the picture to where you want to monitor it.
If you had a new Mac laptop with the built-in iSight, that would work. But iSight alone is not going to do what you are asking.
Check this personally recommended, inexpensive product out here:
http://www.evological.com/evocam.html
And do post back and let us know how it all works out.
Respectfully,
Bill Gallagher