posterous is a new blogging tool that takes simple to extremes. To post to posterous you just send an email to post@posterous.com from any email account, the mail is posted and you get a reply. At that point you can set up a posterous page/blog and then everything sent to posterous from the same email (you can add more) will go onto the posterous page. Mine is John’s posterous.
What is really clever is how posterous deals with content.
Text becomes, well text, and image is posted as you would expect, but so is a image url). A series of images are turned into a mimi gallery. Powerpoint is passed over to Scribd and presented on the posterous page with iPaper as are pdfs. If you print a pdf frpm Safari on a mac and mail it to posterous, the pdf is displated via scribd and the links on the page are live (example). Pasting an image, say a screenshot, into your email app puts it on the blog, as does pasting code from kwout: kwout example. I managed to create 10 posts of all sorts without any problems, on a mac you can even Drag and Drop to Posterous via a simple Automator workflow.
Youtube and other video service are embedded as are mp3s.
posterous is just out the wrappers, but the developers really seem on the ball
For education, I am thinking this is a really quick way to create a blog, a series of resources for learners (rss of course), a student portfolio etc. With 1 GB of space you could use it for podcasting much simpler than many other methods.