Nikon S3300. Machka has been using the previous S3100 model to great effect to the point that participants in the photo competitions she enters comment on the quality of the pictures. They aren't waterproof, but they have been everywhere on our rides in all sorts of conditions -- it's a matter of looking after them with a waterproof pouch or bag.

Nikon have been around for a long time and know their stuff. Same with Canon and Pentax.