Lots of podcasts via links from Classroom 2.0 that address aspects of Web 2.0 tools. Good resource. Addresses various resources from podcasting to videos to PD.
Explains why Web 2.0 is no longer informative and that "webtool" is the preferred term, at least according to Edtecher.net, although I have heard similar positions from others, too.
Another free tool to make slideshows--just add images, attribution and comment..will play just like other Web 2.0 tool slide shows and can be embedded on social media or lms (learning management system). Played around with it and it's quite easy.