First off new trailer: http://www.youtube.com/watch?v=P-o2KMm-5tQ
Secondly, ENB got an invite to an invite only demo playing of what is probably going to be the beta (ie server stress test) and here's his reaction to what he played: http://www.youtube.com/watch?v=1CGvXh_pEWs
Few points to note:
Human/hollow is now a gradual thing not a on/off thing.
Being hollow no longer protects you from invasions.
Friendly summons are now time limited and the more enemies the summon kills the less time they will have available.
Weapon buffs from spells (sunlight blade would be an example from DkS) now seem, not confirmed, to scale with a certain stat.