Broke the rear derailleur somehow the other day on my old Jamis steel 105. The 105 set is an upgrade I had installed about 5 years ago. It just snapped in half on the part closest to the wheel. Then on got tangled up in a spoke and ripped the spoke off one end and bent it.
Dropped it off at the LBS later that day. Still waiting for a call from them and the estimate to repair.