I should note that I have been looking for a plugin like this for a great while now. I run a massive multiple author platform and adding this to it is exactly what I need in future developments.
I ran a quick test of it and it appears that the compare link times out? Did not work for me. Other features that I tested worked fine. I understand that this is version 0.1 and I am only hoping that you guys will continue to develop this.
Some things to consider are that most users that will add this plugin will add it for multiple author sites, and these sites are rather heavy in both content and traffic... therefore please consider coding it with this in mind so we do not end up having a great plugin that will destroy the server (like some other plugins do).
Also, I have one request, please add a feature where we can rename some of the words, like I would not use Fork for instance.
Nonetheless, I will follow this space! Cheers for doing this.