How to Find iMessage Users From Contacts on iPad

With iMessage app on iOS 5, you are able to send lots of messages, photos and videos to other iMessage users. If you don't know your friends and family who have set up the iMessage account, here is the tutorial how to quickly identify all the iMessage users from your contacts.How to find iMessage users from contacts on iPad* Tap Messages > the Compose button, and type the first letter of the name