Thanks for creating this. Some time in the future, we'll hopefully be all editing slides in the cloud, but this is useful till then in the corporate world. #DeathByPowerPoint

One question I have though, is where, in your blog, you said highlighting changed portion is more complicated to users than rendering the two slides side-by-side. I understand it is way more technically complex, but I hope you're pursuing that. For text slides, that feature is a must-have.