I have to say that I’d love to have something like this. A month or two ago I spent a few weeks off and on banging on OPEN-XCHANGE. I tried several times to get the prereqs right so that I could build slapd from source and then build OPEN-XCHANGE in order to be able to configure all of the stuff that needed to be configured. At first I got stuck near the top of the Debian install instructions. Then I got stuck in the middle, and by the time I had written a shell script to do most of the dirty work, I got stuck at adding the LDAP user. I also looked at installing OpenGroupware but a lackluster attempt at figuring out what to do with nightly build .debs I gave up.
I’m going to repurpose a box and put Debian unstable on it (testing has an older version of automake) to play with Hula, as it seems like it has the easiest build/install process so far:
su make install
Granted there is some configuration to do after that, but from what I’ve heard in #hula on freenode the process is quite easy.
That’s not to say that I’ve stopped looking at alternatives to iCal-over-webdav or Exchange or an exchange workalike for my calendaring and general togetherness. I’d love to see a livecd with openexchange already running on it. For now I think I’ll build Hula and see what the buzz is about. I’m confident that it’s going to progress and improve quickly.