PaperHelper is aniPad app that allows split screen--search web and take notes on other side ($1.99). This app really makes research online quite easy. Recommend.
If you want to bundle websites (URLs) for your students into one link, this is a really sensible solution. Free and very simple to use--just paste URLs and it links ('stitch it').
Good blog on what teachers should be able to to with mobile learning for 21st Century learners. Has sensible links too to social bookmarking, audio and more.