Joey,
I checked a few of your files and, while you're saving at a good image size (640x480px), your file sizes are still quite large (around 150kb each). Most image programs allow you to compress JPG images when you save them. I tried this with one of your files and was able to cut about 40% off the file size just by saving at 80% quality. I recommend running your files through some sort of program to compress them at least 80% (for most images, you can probably go as low as 60% before you lose noticeable quality). This will nearly double the number of files you can upload.