Which compact digital camera is the bestseller now?

The Canon SD series (SD200, SD300, SD400, SD450, SD500, SD550) are very, very popular in my area [Silicon Valley, Califonia]. They are what reviewers call "ultra-thin" cameras and are easy to use that also takes great pictures.

Without trying I can already count 10 people I know that have a Canon SD-series camera and two who have older Canon models. Also, I recently went to a large convention in Los Angeles and noticed how all of the journalists carried SD-series cameras (if they didn't already have an SLR).

I guess it should be Canon A520. It is one hot selling sequel to another hot selling camera, the A510. These models are popular due to the crisp photographs taken in most well-lit settings, without the need for major tampering. Their ease of use is commendable. Technically, I am not sure if this is the "best" seller, but it is very popular for day-to-day use in atleasy 3 countries I know of.