Apart the fact that you are reporting the upgrade as a disaster, the post is more or less a copy&paste of sentences one can find @Apple server docos web site. I guess you found them after upgrading… A shame!
I hope you were able to have your server up&running without too much tricking around.
Myself I am still running SL server, and not yet ready to upgrade, although one of my MBP is already on Lion (client, of course). It would have been nice to read what you really did to recover your server… Another post maybe, when you will have more time (I suppose you were a bit busy recovering…).
For Lion client, I had also issues, like Truecrypt which depends on a newer MacFuse version; Parallels version 5 not supported at all and needs an upgrade, Sweet Home 3D needed a Java upgrade: that’s pretty much it and rather happy so far.

Keep on.
Cheers,
RasKal