http://www.dpreview.com/reviews/canong10/page24.asp
# Price is very high considering other cameras in its class and low
end DSLRs.
# Some noise visible even at ISO 80, Noise Reduction effects start to
creep in and smear detail from about ISO 200
# ISO 800 and 1600, though improved from the G9, are still so noisy
(and soft) they're almost pointless, ISO 3200 very low resolution and
complete waste of time