While searching Music Speed Reading to help my brother I came across a few pages:
Speed reading software, articles and tips (Ababasoft) – has lots of background info on speed reading plus flash games to help you develop your skills. There are lots of them, there is even a speed reading metronome. The site also has a lot of flash games to learn music theory. Great site.
RocketReader – An aussie product which is an end to end speed reading and comprehension tool. Looks good – a little pricey ($99 AUD).
There were other relevant tools (mainly screenreaders) at this site where I came across the above two links.