This is very interesting! Many users are reporting the same thing over on HowardForums too:
HowardForums: Your Mobile Phone Community & Resource - Droid Camera Fixed? Try your camera now...
I find it hard to believe that this is a coincidence. I guess it's possible it's due to cleaning off lenses, but I tend to doubt that. There must have been a silent update pushed out to our phones, what else could explain it?