See the New Class Calendar with hosting and interface provided by http://www.calendars.net/

Anyone can add events to the calendar. It should help you guys find when there are office hours and coordinate schedules. It is located on the "Class Schedule" link from my (spinning head) home page.
http://www.zse4.com/beacon/calendar.asp

Note that I will be cancelling my Thursday lab hours for a few weeks while I do some mop up work in South Carolina. Any reasonable hour that is not taken on the calendar is also a time when I should be available for one-on-one help for you guys.