Is there anything out there comparable?
I must admit I don't plan to change what I m using now so I never searched for anything new, just do a search and you'll know soon enough what is out there.
The biggest problem I have left with it is that it won't let anyone post events to groups, a bug I probably caused myself while fixing other stuff.
If you read carefully through the aligtner thread it should work 100% or close to that
PS ..I had a peek at your site but could n't find a calendar link
, navigating to it manually tells me it's there but beyond my permissions
(development/under construction ...Forever?¿?)