ECM is an awesome utility for compressing ISO's. Here are the steps in which to use it.
1. ECM the file by dragging the ISO to the program. (this compresses the ISO, although very slightly...)
2. Rar the ECM file with best compression and a solid archive. (this compresses the file GREATLY. I had Xenogears at 700+ MB and when it went through this process it was 200+!)
I think that doing this would really benefit EP. 1, it would cut down on bandwidth. And 2, it would make the 56k'ers happy and vote cause of something thats more easily accessible. To make this make sense to the people without ECM to un-ECM the ISO, I could write a tutorial if nessecary. Anything to help out EP!
There is more info about this here.