Pretty violent vibration @ 3,300rpm

[Severian]

For posterity, I've taken my car to the shop to get the clutch replaced. I drove just over 100,000 miles on it, and I believe having the clutch replaced (along with any other quick fixes they see down there) will resolve this problem. I'll update when it comes back from the shop to let everyone know if this fixed my vibration @ 3,000 rpms (under heavy torque).