macworld directory services slides (and plutil and afp)

Can anyone tell me what the e.t.a. is for the Macworld Directory Services slides being posted? I'm having trouble with AFP file sharing with leopard server, if forced to use kerberos... The lecture mentioned a 'plutil' command but I don't remember the details. Does anyone know what exactly the command is, when to use it, and what it does? Thanks, Chris