I checked out Zimbra and it seemed cool, but again, was way too complex for my needs. Finally found what I'm looking for at calendars.net which allows you to create a freely editable calendar, or put a single username and password on it. Perfectly simple!
If only I could sync it with google calendar then I'd be able to edit it from my android calendar app which would be ideal, but in the mean time this will definitely do. Thanks for the suggestions!