For the Brave/Valor Drive, these are some of the abilities seen:
Tornado: A spinning aerial attack. Spins his two keyblades like a top
Dash Attack: You're basically running at a high speed, while bashing into heartless in front of you.
Aerial Arcanum: Pretty much like Tornado, except you also slash your keyblades in combination of spinning like a top and ends with a double slash
For the abilites heard/read from Jap. mags and seen in trailers:
Dodge/Evade: Self-Explanatory
Stunbeat: Swing Keyblade, in an effort to stun your enemies
Red Shot
Heatlance
Flametan
Red Meteor
Comet Rain
Grenade > Grenada > Grenaga
Air Juggle
Written by: Non-Exsistant One
Zeus' Thunder: Strongest thunder spell.
Herc's Might: Second strongest thunder spell.
Hermes' tail: Weakest thunder spell.
Safe landing: Recover from mid air attacks.
Full swing: Sora swings the Keyblade with full force.
Mawarikomu: Slide and get behind the enemy for an attack.
Wal kick: Kick off of walls and possibly enemies to stay in the air longer.