Let me start by saying, I love lion. The os is amazing. That being said, Lion server is the biggest pos server software I've ever seen. Functionality is limited to the point of no control. Not only do you lose the individualized control of several core features, upgrading a pervious SL server breaks every core feature you'd need. It ruined my OD, disabled every virtual host website, discarded the VPN settings and believe or not, was set to sleep after 15 min by default. I don't know what apple was thinking, but DO NOT Upgrade. Apple needs to release several bug fixes before this product is usable.
It looks like Apple is trying to make server software that's really easy to use so consumers can set up their own servers in their home, but the Internet is a very dangerous place to run a server if you don't know what you're doing. It's even a greater risk if your server is on the same LAN as your home network. The server admin tools for Lion, from what I can tell, are just too simplistic to be taken seriously for business or professional use, and I fear that Lion Servers will just increase the number of zombies available for botnet service. I have to ask, what were they thinking?