CV joints are very possible. The passenger side one on my car was starting to fail and it shook the car pretty violently on acceleration. Was especially noticeable on the highway or roads where I wasnt stopping and going. I could really get it to act up if I did 70 MPH or so for about 5-10 miles... then if I nailed the throttle... it shook the car around like a rag doll. Was perfectly smooth during steady cruise with throttle held in the same position. I think hitting the throttle caused the joint to flex and effectively threw it out of balance. Once the axle was replaced it was like a completely different car.
Hope this helps.. good luck!
