I have used all of these recommended digital media tools...fairly easy to use. Recommend all. However, if you want a quick and easy podcasting solution, try Audioboo.
iPad app for students--you can insert text for students to practice fluency or use as a teleprompter for choral reading. Free, of course, and easy to use.
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.