Bukkit

• Added support for colors in messages
• Added permission checks
• Increased group check backwards compat

• Threaded CommandSign execution
• Allowed waiting during sign execution
• Stopped commandsigns from being run simultaneously
• Added cooldown to commandsigns
• Switched save format (Will make future updates easier!)
• Allow for unlimited lines
• Added silent mode to all checks
• Added negation clauses for custom else code
• Upgraded permissions compat even more. =D
• Code cleanup
• Added lots more variables
• Cleaned up formatting
• Added /cmds, /cs and /cmdsigns aliases. (NOTE: /cs is used by WorldEdit)

None! =D