Yea I see what you mean about spreeder.com. I think what makes it so fast is that I don't have to move my eye across the page in what I think are called 'saccades'.

I imagine an interface where I fix my gaze in the center and see text pulled through the single point. Perhaps the words near the fix point are a little blurry. Words further away are unreadable. I think there should be something like a gutter on the right or left for images, equations or code samples that floats from bottom to top as it is in context.

If I hit pause I would like to see all the text snap into focus with my focus word highlighted somehow.

Also, I would like this to just work with any old web page. I hate having to pull the print version of long articles then copy and paste into zap reader.

Good luck with your site.