What may be the craziest and cutest application of the latest advances in technology

I'm surprised this hasn't got into the media yet. It's still got a way
to go but I can see many pet lovers in the future equipping their cats
and dogs with this sort of technology. Parents might even make children
use these devices.

http://lab.rekimoto.org/projects/catalog/
Cat@Log: A Human-Pet Interaction Platform

there's a video on the site

"
In spite of the development of technologies that support
human-computer or human-human interaction, few studies have been
conducted for improving interactions between humans and pets, pets and
computers, or between two pets.

We propose a new area of research on entertainment using computers,
called "human-pet interaction."

As an initial step in this research, we have developed a series of
sensing devices that can be attached to pet cats, called Cat@Log
(cat-a-log). These devices comprise various sensing units such as a
camera, a GPS, an accelerometer, and a Bluetooth module. Here, we
attempted to determine an optimum design of the devices such that they
can be attached to a pet without causing discomfort to it; for
determining this design, we considered parameters such as the device's
form factor and way of attachment. These developed devices can recognize
the experiences and activities of cats; information sensed by the
devices is transmitted in real time by using the Bluetooth wireless
module. We used this platform and developed a software system that
automatically recognizes a pet's high-level behavior and posts it to
Twitter.
"