Lion server - networked logins?
The following links will be helpful in getting you started with OS X Lion Server. Without knowing exactly what your client setup is, I simply provided general information in regards to OS X Lion Server. Hopefully it is organized in a fashion that is beneficial to you. 

Standard Server documentation


Lion Server
Lion Server Support (Nearly everything needed for basic management)
Lion Server Advanced Administration
Xsan2
Apple Server Diagnostic User Guide


Apple's new Profile Manager


Profile Manager

More on Profile Manger
iOS4 Education Deployment Guide (outdated, but helpful | also applies to business)



Admin tools are still available


About Server Admin Tools 10.7.3
About Server Admin Tools 10.7.4

NAT/DHCP tips
DNS tips





Step by step (very simplified)


Simplified Server install | Utilize the documentation above to fill in the gaps
Simplified Administration | Utilize the documentation above to fill in the gaps