See the article about MobileMe here: Apple - MobileMe - Find your iPhone or iPad. Mobile Me helps locate a lost or stolen iPad or iPhone and can even shut down, lock, or erase content from a distance. Good information here that will help answer your question.
i sign up for the free trail , but it require me to fill on my credit card information , i think over and i don't want to try. if any one have free trail software with out need to enter credit card information , pls share with me.
use a prepaid credit card with just the basic amount of the service for one year then if the ipad is stolen or lost or miss placed you can use your iphone or at home computer to find the device.