Canon has recently increased the warranties on their refurbished DSLR cameras and lenses. The warranty on refurb powershots is still 90 days.
I thought I'd post this, because I still see posts from those who are not aware of the longer warranty period.
That might help some buyers relieve their anxiety over buying refurbished, and American Express doubles that warranty when you buy with your AMEX card. I'd check with Amex, they do not specifically exclude Refurbished when bought from the original manufacturer, but there are always weasel words that might exclude a refurbished, words like "Original Warranty"