It would be great if posterboards and event displays had a space for a brand graphic. This is something that would need to be assignable when entering an event, but more importantly it would be great to be able to associate a graphic with a feed of events. This would be so calendar users could easily see the source brand association of the event. Also, event contributors would likely value providing a feed when their events would feature their brand identity. It would make it inexpensive and efficient to add branding to events, especially those coming in through feeds from various calendar systems. It's very important to make it dead easy for organizations to adopt the idea of providing feeds.