"SD850 IS vs SD800 IS"4.5 starson by larue777
Pros: Easy to use, Time Lapse Movie, Clear LCD screen
Cons: No 28 mm Wide Angle
Summary: The 800 has a wider angle lens. The 850 has an interesting time lapse movie movie mode and higher pixel count LCD.
After investigating these two cameras I decided to go with the 850 with its higher pixel LCD screen (230,000 vs 207,000). Not included in the CNET review (or on Canon's website) is the neat Time Lapse Movie mode. It will take a still either every 1 or 2 seconds and then put them together into a movie. It will record this movie for up to two hours. I haven't tested that the battery will last that long though. This is a nice feature.
I think people will need to weigh the wide angle of the 800 versus this time lapse mode, LCD screen and some of the other features (better face recognition ?) mentioned by other reviewers. I haven't found the power button location to be a problem.
After finding the Time Lapse I am happy with my decision. I will save the wide angle for my digital SLR purchase.