A feature that would be interesting is to be allowed to download the same file from multiple places at the same time as one file. It could increase the speed at which a file is downloaded or the chance that the file would be downloaded completely in one swoop incase one person disconnects while you're downloading. Like how Limewire and perhaps other clients I haven't tried groups the same file together, using the same method to be able to download them all together. I think this feature would be great for large files. Maybe this feature is already implemented and I'm just unaware. I don't know if this would be possible or the complexity or issues that may arise from being able to do such a thing, but I personally think it would come in handy.