Easy question, Hammer, and here's my complex hack at it:
Yes, it is beneficial to get your front hip going as fast as possible toward home plate, as early in the delivery as you can, given the following conditions:
1) Your motion should allow you to maintain your original starting posture into foot strike (that is, your motion should not cause unwanted north-south or east-west head movement--your head should move straight toward the plate, parallel to the sloped surface of the mound. Put another way, your early motion should allow you to maintain good dynamic balance into foot-strike.
2) Your motion should allow you to generate hip/shoulder separation for launching the baseball.
3) Your physical conditioning needs to be adequate to decelerate in follow-through commensurate with whatever velocity you generate in your delivery.
As long as those conditions are met, I believe there is really no such thing as "too much forward momentum".