RVDT - your first comment is obtuse and pointless, your link to the pictures however will be much more helpful to Newboy.
To get into forward flight you have to move the cyclic forward to tilt the disc which then moves the aircraft forwards thus altering the angle of the airflow and increasing the AoA. And no, it's not instantaneous!
Cron - it is the Relative Airflow that changes - draw the vector diagram for the hover and then reduce the amount of induced flow (this as Kris says is because you now have a horizontal component of airflow into the rotor as opposed to purely vertical). You will note an increase in AoA which increases the Lift vector (and the drag) but with a net increase in the Total Reaction.
Translational Lift and Effective Translational Lift are just differences in terminology for the same thing.