I think I may have found a solution to the problem of the clunky caving events calendar: Google Calendars
I've exported all the info from the current calendar and imported into a Google Calendar. What I really like about this is the info is available for exporting into your own calendar software, such as Outlook, etc. In searching Google, I found several NSS Grottos that already use the system.
Here's the link to the calendar info. If you have a Google account, just use this link to import it:
http://www.google.com/calendar/render?cid=http%3A%2F%2Fwww.google.com%2Fcalendar%2Ffeeds%2Fcavechatmods%40gmail.com%2Fpublic%2Fbasic
Google says it's also viewable by non-Google account users but as yet they don't have it in an html format. If you don't have a Google account, you can download that link and save it as a cvs file that can be read by Outlook or any other calendar software that reads cvs files. In the meantime, I'll leave the old HTML calendar up, but make it viewable only to keep from having new stuff added to the old calendar. Any of the forum moderators have access to add things to the calendar, so if you have an event, please let them know.