Today I pulled out my trusty Rebel Xti and it would not auto-focus. Just made this sad little clicking sound like it was trying but just couldn't muster up the strength. At the time I was trying to take a picture of a card I had just made; needing to take advantage of the quickly fading daylight, I reached instead for my ancient point-and-shoot, and wouldn't you know it, the batteries were dead. Spent 15 minutes looking for the backup batteries, to no avail. Sigh.
Looks like we'll have to find a camera repair shop to see if my Rebel's lens can be resurrected. I am not a happy camper.