Did some work on the Cervelo. Looks fine, now. The derailleur hanger had to be hammered flat, but once I took care of that and made some adjustments, it was shifting better than before. The fall certainly made the hanger worse but, even before that, I'd suspected that it had gotten a little tweaked on the VA trip - it was always a little out of adjustment; part of me wonders if that contributed to the thrown chain, too. *shrug*