I came across
this reading speed test hosted by Staples to promote their line of eReaders.
It's quick and very easy to do the test and I would be interested to know what your results are (state if English is not your primary language).
There are 3 different pieces of text to try (click on the Start Again button to get to the other 2) and post your 3 scores.
Mine was 345, 347 and 392 (on the Wizard of Oz one) words and answering all questions correctly. English is my second language.