Speed Reader Plus for Pocket PC/Windows Mobile. $20.
http://www.mobiledynamo.com/prod01.htm
"Rapid Serial Visualization Presentation ". The words flash in a box in sequence, pausing (slightly) for punctuation and paragraph breaks.
You can crank it up to over 1000wpm, retaining comprehension.
Eyeballs tend to dry out at those speeds, tho.
-bjc