"Instantly record & publish digital voice recordings" online, using phone, Skype, or mic. Saves and stores audio files in MP3 that you can post to website, blog, Facebook or Twitter, and playback with browser, tablet, or smartphone. Voice comments can be recorded, making it possible to use for language lessons. Great potential. Anyone who has used this with students, please comment!
Google has created a multi-week free online course this summer (2011) as a kind of experiment in mass learning. You can read the discussions, view the videos, and use the resources, incluidng a Diigo group, asynchronously, so hop on board!
Animoto has free educators accounts and you can add up to 50 students as well. This is the equivalent of their upgraded Plus account, which allows you to make and archive longer videos.