cat camera

i just saw stephanie's project attempting to follow her dog and it remembered this thing i saw in people magazine about a cat camera. this couple attached a camera that would take a picture every two minutes to their cat's collar and were able to see their cat's every moment and where it went everyday. they even found out that their cat had other cat friends in the neighborhood. i thought this was really interesting because stephanie tried to see what her dog did on a daily basis but since the dog knew that she was being followed, she did not go about her daily life. the cat camera would have worked for this because the pet would not know or think that they are being followed.
i couldn't find the article i read, but this is the same couple's flickr with the pictures from their cat's daily life.
oh and i just found cooper's (the cat) blog :)