Did yu save them to your sim card recently? If so just go to contacts and then press menu and sim phonebook. Press menu again and select copy all to phonebook.
Posted from my CrackBerry at wapforums.crackberry.com
Backing up your personal information with DM is a must... if you've done that recently or even a while ago at least you can get back to that point in time if you restore your contacts from that DM backup file.