Bukkit

0.97 (Jan. 21):

• A newly generated configuration file will include the instructions
• /irc command
  • /irc op|deop|voice|devoice|kick|connect|rejoin|disconnect
  • Permissions are available for each command
• !players command looks nicer ("There is 1 player" instead of "There are 1 online")
• Topic changes are shown in Minecraft
• Some mode changes (op, voice) are shown in Minecraft

0.94 (Jan. 9):

• Added several configuration options so admins have more control over:
  • Which colors to use in certain types of messages
  • Which events to show in Minecraft or IRC

0.93-1 (Jan. 6):

• Pays more attention to what other plugins are doing

0.93 (Dec. 12):

• Colors added to event messages to easily distinguish them from regular messages (customization coming soon)
• When !players is used, it sends a message to Minecraft
• Kicks are sent to Minecraft
• Added by TerrorBite:
  • Server messages (from /say in console) now shown in IRC
  • When a player dies, the in-game announcement is repeated in IRC
  • Message is sent to IRC when a player is kicked from the server, including the kick