From what I heard command blocks need you to be op, creative and have it enabled in the server properties? Im just wondering why hasn't bukkit enabled them fully yet? What seems to be the problem? Will command blocks be working fully within its next beta build?
you need to "enable-command-block=true" in your config, then (after restart) you can use them. You won't see them in creative, as they aren't implemented in the material-menu. So get them with /give [yourname] 137 [ammount] I hope 137 was right *g* Working fine... no bukkit problem there!