Chaud did a nice preview a few weeks ago, he used a very basic sword so as to show off the actual enchant. however when you put them onto new weapons they are actually quite tame compared to the Cata ones. it is definitely better, to me.
Rivers Song (Tank) -- water dripping off your weapon
Jade Spirit (Caster/Healer) -- soft green glow
Dancing Steel (Melee) -- same as DK's fallen crusader
Windsong (random stat booster) -- the old Soulfrost mixed with a little yellow
Elemental Force (chance for extra damage) -- orange & purple, like a mix of Fiery Weapon and Lifestealing
Colossus (budget tank shield) -- looks like a weak version of Mongoose