ninjalootr

Well I learned it from the Apple Training Series: Mac OS X System Administration Reference, Volume 1 book during in the 10.4 Server days but I think that has stayed the same with 10.5. Also I don't know if there are any specific Articles there but afp548.com has tons of useful info for OS X Systems Administration.

Yep you can. You can also mass import from LDIF files in the command line.