Wizard X casts Dimension Door transporting you and a companion next to Monster Y, as you did not cast the spell can you attack Monster Y when it is your initiative - or does the actual act of Dimension Door-ing cause you to miss your turn (i.e. that counts as your turn).
Dimension Door: If the caster brings other creatures with him when he casts the spell, are the passengers unable to take any other actions until their next turn, or is that just for the caster?
Oh yes - it can be done. It carries its own risks, though - it's a lot like being the helicopter pilot that drops a strike team. The enemies tend to resent your action and try to take it out on you. If you can, choose a bruiser who has the Bodyguard or Harm's Way feats. ;)