We have effectively a mailfile calendar being used to co-ordinate all our training sessions - (the calendar invites staff to training meetings). All works fine. But we need a view of who has had what training. So I created a view with selection formula:
Embeded views with show single category enabled are the way to go.
Create a categorized column (first column) with the From field in it. Embed the view on a page (or form!) and put @username in the show single category formula.