Thanks to DamianJ for this link which a nice chart listing the command line options for STSADM. I have stuck a blown up version of this chart on my wall as a reference for my team.
Sharepoint STSADM Reference Chart
http://sharepoint.microsoft.com/sharepoint/Documents/STSADM%20Posters/Stsadm_Cmd-Line_WSS_3.jpg