If you don't want to crop the picture, you can make it smaller (reduce the resolution). I use a freeware program called STGThumb to make smaller versions of pictures. It's generally used to make thumbnail pictures, but you can set it to reduce to any size (even medium size). Making them less than 640x480 makes 'em fit on just about anybody's monitor.

If you have a high-megapixel camera, the pictures might be too big (for our site photo albums) at the usual high resolution.