When it comes to online calendars, I tend to use either Google Calendar or 30boxes . I used to like Trumba, but they've gone a bit too comercial (very expenses plans, etc.). For quite a few of the folks I regularly work with like schools and non-profites both Google's calendar and 30boxes work just fine. In fact, when I'm not looking to connect calendar info with a specific set of applications/tools (as in part of Google's accounts) I tend to recommend 30boxes because it is very easy and intuitive to use. Additionally, it has some interesting built-ins like to-do lists, and a "Webtop" view which I think are outstanding. In looking around their forums, I came across an intersting mashup called Robocal . It takes you access info from either 30boxes or Google Calendar and sets up a phone number and PIN so that you can call it up and hear your calendar read to you - upcoming events, etc. Each "user" (as defined by the phone the call from) can leave a message or note for him/herself, as well. Although the robo-voice reading the calendar is the most elegant one in the world, it does a great job. For schools, there is the obvious advantage of essentailly enhancing accessibility to information. For an individual teacher, structuring a 30boxes calendar effectively using homework assignments, due dates and the like, would essentially build a "homework line" that students (and parents) could call.
I'm going to setup an example of that latter application shortly and will post an update when its done.
