I feel for people trying to use this in enterprise settings. I'm lucky that it has all I need for home use, probably their target audience now.
I've got a temporary Lion Server install (posting from it now) and my SL Server is still running, so it's easy to do an A-B comparison.
Server Admin lists the following services in SLS which are not in Lion Server. Remnants noted:
Address Book (in Server.app, but no options. Does it use SSL?)
AFP (in Server.app, seems to have less flexibility)
FTP - no server in Lion client either.
iCal (in Server.app, but no options)
iChat (in Server.app, don't know the limitations)
Mail (in Server.app, seems limited to one domain)
Mobile Access (I don't know what this is, never used it)
MySQL Missing
NFS Missing
Print Print server missing
Push Notification -- seems missing although I thought that was an advertised feature.
QuickTime Streaming missing
SMB No Samba, SMB limited to creating file shares. Limitation of Lion client as well.
VPN in Server.app, simplified
Web in Server.app, simplified
There is a package of the other tools available for download (currently from the Developer site, but eventually available to the public like the Snow Leopard Server tools are). See an earlier post by me for links.
