Get one of these, and you can watch it 24/7.... WIRELESS-G Internet Video Camera xtreamgadgets.com/product.php?productid=44991
What if someone somehow was able to view your garden by hacking the camera, and then they find you, and report you to the feds!!
Then you're screwed..... However you would have to be a really good hacker to do that, and since there's no gain in that, I highly doubt anyone would spend the time trying to hack it...
Its quite a nice idea but why buy a camera and view my garden on my pc screen, when I can just open a door?