Moomeo lets you send an email to it and then it posts it on the Web with its own url. They immediately send you the link. No registration is required. People can leave comments on it, but it doesn’t appear that you can change the content once it’s posted.
Web tools like Moomeo and Posterous (which also lets you post by email, though there you can change it once it’s posted) are ideal application to introduce technology to teachers or others who are reluctant newcomers. In fact, look for an upcoming post here titled “Ten Ways To Introduce A Reluctant Colleague To Technology.”