Secure Notebook (OS X) 1.1

Trace your stolen notebook.

From the developer: "Secure Notebook helps to find stolen laptop computers by using a hidden background application to send Arin whois queries and other useful information to an email account.

Just enter your email address, SMTP server and you're ready to go! You can also configure a wide range of options if you like. The readme file is well written containing lots of information.
"This version adds Local/WAN IP queries, minor interface improvements, and minor bug fixes."