If you are looking for a way to read lots of blogs and web sites from your iPad or iPhone, Google Currents could help. It is an RSS reader that saves content for off-line reading.
"FreeSpeech is a communication tool based upon research in augmentative and alternative communication (AAC) and human-computer interaction, as well clinical insight and expertise in speech and communication disorders." This free app could also be used to support early readers.
This is an interesting take on eBooks for pre-school children. Though not free, the app includes audio books, games, and the ability to send a custom report on the students' progress.