Microsoft, actually. (Well, they have recently announced 5000 redundancies.) Office Live Workspace is by no means the first online collaborative tool – Google, Zoho and others beat them to it ages ago. But this one uses full-blown MS applications, which people are used to (whether you like them or not, familiarity counts for something). We’re starting to use it in my circuit for the ‘Plan’. I’ve just set up an online diary for a group of evangelical churches who want to make sure that when they organise an event, another church isn’t already doing something the same day. It’s not public on the web, but only accessible to those whom you invite to view and/or edit it.