I was looking at file sizes of Blu-Ray movies today. The average size of 320 current titles was 27 GB – for just the movie alone. You add in all the extras and what not that usually come with a DVD (deleted scenes, extra content, etc) and the size jumps up to an average of 35 GB per movie. Looking at Comcast’s proposed threshold of 250 GB before they bill you extra, that translates into viewing just nine Blu-Ray movies before you hit your limit – not to say any other internet activities. Just watch nine movies and you’ve blown…