Bukkit

October 29th 2012:

• Added support for 1.4.2

October 23rd 2012:

• Added specialized arrows
• Grappling arrow (Uses string)
• Explosion arrow (no damage to world, uses gunpowder)
• Torch arrow (uses torch, included support for WorldGuard)
• Added permissions and configuration options to toggle all features
• assassin.headshot
• assassin.arrowspecials
• assassin.roll
• assassin.longjump
• assassin.torcharrow
• Added long jump (uses feather)
• Fixed various bugs and a few random updates

None that I know of.