My only suggestion: Update horde! For reelidentities we're looking for a good groupware platform, and horde seems to have everything we need - except the version that TCH is running doesn't have a lot of the features touted on the website as being in their new versions. We really need to be able to send invites to different events (instead of using evite.com, I'd rather keep it all local on the site.) Also the new version allows shared contacts, shared calendars, and many more modules are now available.
I've only realised this this morning, so I have never asked about it in the past. I've been trying to install it myself, but it appears that some sort of shell access is needed to install some librairies. (which of course, is not available at TCH.)
Does this seem doable? I can't see the version of Horde you are currently running, but I would guess it's kind of old. (The latest version of Horde is from september... the calendar (kronolith) was updated in January.
Many thanks! I hope you consider this!
Vincent