[CalendarServer-users] Web CalDAV client

Does anyone know of any decent web-based CalDAV clients that work with CalendarServer? We currently have Leopard server's iCal Server running, and it works great for Leopard iCal clients, but we need, at the very least, to have shared resource calendars be read-write accessible cross-platform. Sunbird is not a good option, since if we have calendars for, say, 30 shared resources, Sunbird requires the user to manually set up a calendar for each one. Either a good cross-platform desktop client (without the above issue) or a web-based client with read-write CalDAV support would probably work for us. Thanks! Jan