Bukkit

New enchantment ideas:
Chestplate + flame = reflect fire (When a player hits you, they set on fire)
Boots + Aqua Affinity = snow trail (Leaves a snow trail behind when you walk on land (Like sow golems) and freeze water when you walk over water)
Axe + Silk touch = shapeshifter (Right-click a mob to turn into that mob until you are hit or hit someone)
Helmet + Silk touch = invisibility (invisible while sneaking[shift] )
Boots + Knockback = Jump 2 blocks high
Boots + Sharpness = stomper (Jump from high areas and land on your enemies with little fall damage to yourself an more damage to others)
Helmet + Aqua Affinity = strength while in water (strength II potion effect)

More enchantment ideas comming soon! :D

Helmet + Silk touch = invisibility (invisible while sneaking[shift] ) I would also like to see this.

Would be cool if it was invisibility while sneaking and not moving(aka changing pos).

The infinity sword seems a little op atm.

Your other suggestions are also cool, this one is my favorite tho.

:D thanks