Video Recording
Verey I will record via the built-in iSight camera* and send out alerts together with other important information; IP addresses, machine serial number, MAC Hardware Address and even details of nearby wireless networks out immediately!

*Works on Mac machines without camera too.

The machine will then automatically 'freeze up' to prevent any mishandling and display details on how to contact the owner.

Twitter
With Twitter service, owner can also receives the alerts via IM, email, from the web and even as SMS Text message to your phone. Twitter.com
 
IP Addresses
Unique address that certain electronic devices currently use in order to identify and communicate with each other on a computer network utilizing the Internet Protocol standard (IP).

Wireless Network
Refers to any type of network that is wireless, the term is most commonly used to refer to a telecommunications network whose interconnections between nodes is implemented without the use of wires, such as a computer network.

MAC Hardware Address
A quasi-unique identifier attached to most network adapters (NICs). It is a number that acts like a name for a particular network adapter.

Machine Serial Number.
Serial number of the computer.

All these to help the owner when reporting it to the authorities to help in the retrieval.