Paperport Notes has an update that allows for OCR recognition. A paperport notes account is required for this to happen. Any picture that is snapped and pulled into a note can now be read by an ipad or even edited within the app.
Though this is not necessarily a post specific to the iPad, many of the suggested resources either have apps or can be used on the iPad via a web browser. There are some interesting concepts for ELL/ESL or even foreign language learning.
A great article about pedagogy with the iPad. As the author states, "We have to make the iPad suit the learning, not make the learning suit the iPad to justify having it. So think of the skills you want your students to develop and then work out if the iPad can improve that skill. If it doesn't, don't use it."
This is a great article about how iPads can be used with the writing process. It highlights best practices that teachers can follow in order to best leverage the technology, and suggests apps to support the process.
This list comes from Teacher Reboot Camp. The suggested apps provide multiple ways for students to interact with various aspects of stories: plot, characters, setting, etc.