Phil, any luck in getting this mod done?
If not, then I might have a crack at it tonight since I want something similar. That is, I want an Events island that simply lists the top 5, 10 (whatever) public events from the calendar. The list will simply be the Event title (clickable link) and the date of the event.
I personally think this is more useful to convey event information to your community, than the current Calendar island. The Calendar island requires that you hover over a highlighted date to find out what's happening, and it's limited to only showing the current month.
In terms of your request, what I'm planning on doing could be easily modified to only show events that occur "today", or else a "no events today" style message. Let me know if you already have a solution, or if you're still interested in one.