Well I got to spend some quality time with Lion server yesterday and all I have to say is wow ... it's got some serious issues going on. Anyone considering deploying this on a large scale I would recommend to wait a while at the very least.
The web interface for the profile management is horrible (and doesn't even render properly in latest Safari!!?!). There are items far down the left hand list that I could not even get to. Push doesn't properly work (at least at first try) for the profiles, and in fact I also had issues even downloading and manually loading a profile on a test machine -- so not sure if it's the push or the actual profile stuff to blame. Some things took, some didn't. Open Directory/network authentication is painfully slow (and yes everything resolves properly both ways). Any changes to configurations result in 2-3 minutes of the "profile manager" updating after you've made the changes, during which time the server was not very responsive (a late 2010 mac mini w/ 4G ram) and nothing else running on it at all. Showed lots of free ram, but it showed the CPU cores massively pegged the whole time.
I am very very disappointed with the direction they have taken things with Lion server. Don't know who they had on the teams that made the decisions on this one but I hope they don't stick around too long :/
I honestly can't recommend this to any clients who need more than absolute basics (file sharing seems to work ok for AFP users anyway). I found serious issues (read: data loss) with iCal and Addressbook components within first 15 minutes of usage. iCal also lost delegation info 3 times in a row on one calendar. Not sure I even fully understand how this new delegation is supposed to work ... when you make new "calendars" they look more like groups (with calendars embedded within them). Group calendars seem to be missing in action as well. Maybe I just need to spend more time with the documentation ...
Time to brush up on my Linux skills again methinks. This new server releases feels very "beta" ... maybe even approaching "alpha" quality.