Just picked this up 2 weeks ago to use as my commuter/ B Bike. Loving the ride.

EDIT 1999 R1000D (CAAD3 with a Slice Echelon CF fork). The rear Ultegra Derailleur was bent to hell (drop out was fine), so I put a Sora short cage derailleur on it till I can source an Ultegra of the right vintage (Just for consistency with the rest of the Ultegra group on it. I know pretty much almost any Shimano Derailleur will work)