Never mind...after looking at: http://forums.daypilot.org/Topic.aspx/386/server_side_event_handling_in_daypilot_lite
The solution was simply as follows:
<DayPilot:DayPilotScheduler ID="DayPilotSchedulerDayView" runat="server"
OnEventClick="DayPilotScheduler_EventClick"
</DayPilot:DayPilotScheduler>
public void DayPilotScheduler_EventClick(object sender, DayPilot.Web.Ui.EventClickEventArgs e) {
System.Diagnostics.Debug.WriteLine("DayPilotCalendar_EventClick: " + e.Value);
}