If you have a few pages you need to read in a book, but don't want to/can't carry it around all day, here's a tip that might help. Using the Best Camera app ($2.99), take a photo of the page you want to read. After taking the picture, apply the "Light" filter, and then save the image to your Camera Roll. Viola! You have a readable picture of the page that is easy to scroll through on your iPhone. The whole process takes about 5 seconds per page.
Handy for grabbing a copy of a reference page in the library or for leaving heavy text books at home when you're out and about.
Below is a photo from my Federal Income Tax reading yesterday. The first photo is the original, the second is after the filter was applied. (Click images for larger view.)