mpj I sent Sheldon Brown an e-mail, the answer to which was that you can get away with running a Shimano 9-speed cassette with Campag 9-speed Ergos and rear mech.
However, I couldn't get it to shift properly using newish components (few hundred miles on them).
I fitted a SRAM 9-speed cassette and must say that the shifting is sweet, but the cassette was 50 GBP
