I think it's the size in KB rather than the pixel dimensions that's important. Most photo editing software has a tool that allows the quality and therefore size of a jpeg to be adjusted. I leave mine set on 6/10 (medium quality), and the pictures rarely exceed 200 or 300KB for a busy 1280 x 960 shot, and still look okay.

__________________
"The future's uncertain and the end is always near." - The Doors "Roadhouse Blues".