Servo library

I'm using the Servo.h library to test some servo RC.
It's good , but I would like to know if it's possible to havea feedback of the positioning of te servo
Example , I'm positioning my servo at 180° , during this operation I would like to know the current position , for example to start an other servo or to swith a led ....
Try to image a small arm robot with 4-5 servo rc , when the servo1 is reached at 100° I start the second one and so ....
I'm looking the read() function inside the library but the return is the value setted ....
Somebody has some idea?

pratically I'm using something like the finite state machine for my project and the positiong values are stored in a structure table and they change continually.
I want to create a teach in function or send the data for positiong by serial or custm application , this is because I need to know the atcual positions of all the servos rc....

I found the VarSpeedServo.h to change speed to servo , that's good !