How do I spawn mobs in SMP?

Solution 1:

As of release 1.1, you can enter Creative mode and use the new "Spawn Eggs" item to produce monsters, even in vanilla.

Solution 2:

You can do it in bukkit with the /mob command.

http://dev.bukkit.org/server-mods/admincmd/pages/mob-commands/

http://dev.bukkit.org/server-mods/admincmd/

Solution 3:

I spawn eggs on my server (it's vanilla, not Bukkit!) with /give (name) 385 (mob id)