No contacts!

My iPhone Contacts Disappeared!: While I was out and about today, my iPhone contacts disappeared. I noticed this when I received a text message from someone on my contact list, which showed their phone number instead of their name. I’m guessing my over-the-air sync with Mobile Me was the cause since I have seen this sync problem before but only with my iMac and dot Mac. But when I got online, my Mobile Me account and my iMac contacts were fine. At this point I don’t know what happened. It sucks to lose your contacts for no apparent reason when you’re out on errands. I wonder if this has happened to anyone else?