Blurb has a new iPhone app that lets you build slide shows that include audio and video. Hosted online storage. Could it lead to book publishing? Free and $1.99 premium. Twitter/FB sharing.
WalkHub is a web application that makes it easy to record and share Walkthrough tutorials that play on top of websites. Screencast recording. Opensource. Free.
Movenote is available on any browser and can be accessed with your Google account. Create video presentations quickly with your webcam and share them worldwide. This looks like quite simple to use and may be a tool for recording presentations and getting them online.