Lots of advice and examples of using Web 2.0 tools in the classroom: wikis, blogs, Twitter, Google Earth, Voicethread, Wordle, Moodle, Google Docs, RSS feeds, Second Life, Scratch, Podcasts, and more.
YTPodcaster is a YouTube podcaster tool that lets you convert Youtube videos into video podcasts. All you have to do is enter YouTube username into provided field and click on "Get Feed" button. The application will process your query and create a video podcast from 20 most recent YouTube videos posted by that user. just chose feed type you want and subscribe.