How realtime is Scrumwise?
Whenever somebody makes a change in Scrumwise, the change will be propagated to all other online users in typically less than a second. So, other users will see your changes in almost realtime. Also, while you are making a change, such as dragging a backlog item or editing a field, Scrumwise will indicate this to everybody else that are logged in, so that they can see what you are doing, as it happens. This way, you can easily see if somebody else is editing a field that you would like to edit as well.
You can try the realtime updating yourself by opening multiple windows with Scrumwise. The realtime updating will happen between those windows as well, even though you are the user logged into all of them.